Pub Date : 2023-02-28DOI: 10.1080/01411594.2023.2178919
Sunena Parida, Tanushree Satapathy, S. Mishra, R. Choudhary
ABSTRACT In this paper, synthesis (solid-state reaction) and characterization (XRD, SEM, EDX, RAMAN, UV & LCR) of a double perovskite: BiLaCoMnO6 (BLCMO) are reported. The structural analysis suggests monoclinic crystal symmetry with average crystallite size = 79.6 nm and lattice strain = 0.00149 respectively. The analysis of the scanning electron microscopy (SEM) micrograph suggests the uniform distribution of grains. The analysis of energy-dispersive X-ray spectroscopy (EDX) spectrum suggests the presence of all constituent elements (Bi, La, Co, Mn & O) in both weight and atomic percentage. The study of the Raman spectrum provides information about the atomic vibration of all the constituent elements. The study of the UV visible spectrum provides of bandgap energy of 2.06 eV and impedance spectroscopy suggests a negative temperature coefficient of resistance (NTCR) character, while the modulus study predicts the presence of a non-Debye type of relaxation. The study of temperature-dependent resistance supports NTC thermistor applications.
{"title":"A double perovskite BiLaCoMnO6: synthesis, microstructural, dielectric and optical properties","authors":"Sunena Parida, Tanushree Satapathy, S. Mishra, R. Choudhary","doi":"10.1080/01411594.2023.2178919","DOIUrl":"https://doi.org/10.1080/01411594.2023.2178919","url":null,"abstract":"ABSTRACT In this paper, synthesis (solid-state reaction) and characterization (XRD, SEM, EDX, RAMAN, UV & LCR) of a double perovskite: BiLaCoMnO6 (BLCMO) are reported. The structural analysis suggests monoclinic crystal symmetry with average crystallite size = 79.6 nm and lattice strain = 0.00149 respectively. The analysis of the scanning electron microscopy (SEM) micrograph suggests the uniform distribution of grains. The analysis of energy-dispersive X-ray spectroscopy (EDX) spectrum suggests the presence of all constituent elements (Bi, La, Co, Mn & O) in both weight and atomic percentage. The study of the Raman spectrum provides information about the atomic vibration of all the constituent elements. The study of the UV visible spectrum provides of bandgap energy of 2.06 eV and impedance spectroscopy suggests a negative temperature coefficient of resistance (NTCR) character, while the modulus study predicts the presence of a non-Debye type of relaxation. The study of temperature-dependent resistance supports NTC thermistor applications.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"258 - 273"},"PeriodicalIF":1.6,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44245831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-28DOI: 10.1080/01411594.2023.2179921
N. Abood, P. Sable, G. Dharne
ABSTRACT The structural, optical and gas detection characteristics of Mn-doped ZnO thin films synthesised by the Successive Ionic Layer Adsorption and Reaction (SILAR) process with varied doping concentrations (4, 6 and 8%) were examined. X-ray diffraction data was used to investigate the structural properties and confirm the hexagonal wurtzite crystal structure. The surface morphology and the existence of all elements were verified using a field emission scanning electron microscope and energy dispersive X-ray spectroscopy, respectively. To explore the vibrational bands present in Mn-doped ZnO films, we used FTIR spectra at ambient temperature. Ultraviolet-visible analysis reveals the absorption edge, which is found in the ultraviolet area, with a minor shift towards high wave length, whereas the energy bandgap decreases as Mn concentrations increase. At 200°C operating temperature, the gas sensing properties of Zn0.92Mn0.08O showed good sensitivity, selectivity and shorter response time when compared to other prepared films.
{"title":"SILAR-deposited manganese doped zinc oxide thin films for NO2 gas detection applications","authors":"N. Abood, P. Sable, G. Dharne","doi":"10.1080/01411594.2023.2179921","DOIUrl":"https://doi.org/10.1080/01411594.2023.2179921","url":null,"abstract":"ABSTRACT The structural, optical and gas detection characteristics of Mn-doped ZnO thin films synthesised by the Successive Ionic Layer Adsorption and Reaction (SILAR) process with varied doping concentrations (4, 6 and 8%) were examined. X-ray diffraction data was used to investigate the structural properties and confirm the hexagonal wurtzite crystal structure. The surface morphology and the existence of all elements were verified using a field emission scanning electron microscope and energy dispersive X-ray spectroscopy, respectively. To explore the vibrational bands present in Mn-doped ZnO films, we used FTIR spectra at ambient temperature. Ultraviolet-visible analysis reveals the absorption edge, which is found in the ultraviolet area, with a minor shift towards high wave length, whereas the energy bandgap decreases as Mn concentrations increase. At 200°C operating temperature, the gas sensing properties of Zn0.92Mn0.08O showed good sensitivity, selectivity and shorter response time when compared to other prepared films.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"274 - 289"},"PeriodicalIF":1.6,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46804425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-21DOI: 10.1080/01411594.2023.2177161
M. Ertaş, M. Batı
ABSTRACT We studied the dynamic magnetic properties such as dynamic phase transitions, dynamic compensation temperatures, and dynamic phase diagrams in the spin-7/2 multilayer Ising system under an oscillating external magnetic field The system was simulated in the mean-field approximation using a Glauber type stochastic dynamic. The mean sublattice magnetizations’ time variations were examined to determine the system's dynamic phases. The thermal behavior of dynamic sublattice magnetizations was investigated to determine the type of dynamic phase transitions (first- or second-order) and to obtain the dynamic compensation temperatures. and type compensating behaviors were seen in various types of magnetization curves. The phase diagrams are calculated in and planes, for different values of the Hamiltonian parameters. The p, i, f1/2 , f7/2 , af7/2 , and af1/2 fundamental phases, as well as the i + p, i + f1/2 , af1/2 + p, af7/2 + p and i + af1/2 mixed phases. The system illustrated one, two, or three dynamic critical points (•) and E, TP, Z, and B special points.
{"title":"Dynamic magnetic properties of spin-7/2 multilayer Ising system in an oscillating magnetic field","authors":"M. Ertaş, M. Batı","doi":"10.1080/01411594.2023.2177161","DOIUrl":"https://doi.org/10.1080/01411594.2023.2177161","url":null,"abstract":"ABSTRACT We studied the dynamic magnetic properties such as dynamic phase transitions, dynamic compensation temperatures, and dynamic phase diagrams in the spin-7/2 multilayer Ising system under an oscillating external magnetic field The system was simulated in the mean-field approximation using a Glauber type stochastic dynamic. The mean sublattice magnetizations’ time variations were examined to determine the system's dynamic phases. The thermal behavior of dynamic sublattice magnetizations was investigated to determine the type of dynamic phase transitions (first- or second-order) and to obtain the dynamic compensation temperatures. and type compensating behaviors were seen in various types of magnetization curves. The phase diagrams are calculated in and planes, for different values of the Hamiltonian parameters. The p, i, f1/2 , f7/2 , af7/2 , and af1/2 fundamental phases, as well as the i + p, i + f1/2 , af1/2 + p, af7/2 + p and i + af1/2 mixed phases. The system illustrated one, two, or three dynamic critical points (•) and E, TP, Z, and B special points.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"246 - 257"},"PeriodicalIF":1.6,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45545505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.
{"title":"Structural, dielectric and piezoelectric characterization of BFN-modified PZT-based (MPB) ceramics","authors":"Kahoul Fares, Benseghir Sabrina, Hamzioui Louanes, Guemache Abderrezak, Aillerie Michel, Boutarfaia Ahmed","doi":"10.1080/01411594.2023.2175676","DOIUrl":"https://doi.org/10.1080/01411594.2023.2175676","url":null,"abstract":"ABSTRACT The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"233 - 245"},"PeriodicalIF":1.6,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43358099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-01DOI: 10.1080/01411594.2023.2188214
S. Baran, A. Hoser, B. Penc, A. Szytuła
ABSTRACT Magnetoelastic effect in R2Ni2In (R = Tb, Tm), associated with the antiferro- to paramagnetic phase transition at the Néel temperature TN equal to 40 K (R = Tb) or 4.8 K (R = Tm), has been investigated by neutron powder diffraction. Rietveld refinement reveals that the orthorhombic crystal structure, reported at room temperature, is stable down to low temperatures, including magnetically ordered state. Based on the diffraction data, thermal evolution of the lattice parameters a, b and c and the unit cell volume V have been determined. Both the lattice parameters as well as the unit cell volume show distinct jumps in the vicinity of the respective Néel temperatures, indicating presence of the magnetoelastic effect. The values of the lattice strains Δa, Δb, Δc and change of the unit cell volume ΔV, associated with the antiferro- to paramagnetic phase transition, are reported.
{"title":"Magnetoelastic effect in R2Ni2In (R = Tb and Tm) investigated by neutron powder diffraction","authors":"S. Baran, A. Hoser, B. Penc, A. Szytuła","doi":"10.1080/01411594.2023.2188214","DOIUrl":"https://doi.org/10.1080/01411594.2023.2188214","url":null,"abstract":"ABSTRACT Magnetoelastic effect in R2Ni2In (R = Tb, Tm), associated with the antiferro- to paramagnetic phase transition at the Néel temperature TN equal to 40 K (R = Tb) or 4.8 K (R = Tm), has been investigated by neutron powder diffraction. Rietveld refinement reveals that the orthorhombic crystal structure, reported at room temperature, is stable down to low temperatures, including magnetically ordered state. Based on the diffraction data, thermal evolution of the lattice parameters a, b and c and the unit cell volume V have been determined. Both the lattice parameters as well as the unit cell volume show distinct jumps in the vicinity of the respective Néel temperatures, indicating presence of the magnetoelastic effect. The values of the lattice strains Δa, Δb, Δc and change of the unit cell volume ΔV, associated with the antiferro- to paramagnetic phase transition, are reported.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"81 - 88"},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47473324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-01DOI: 10.1080/01411594.2022.2149398
S. Baran, A. R. Hayyu, Y. Tyvanchuk, A. Szytuła
ABSTRACT The magnetocaloric effect in RE Co In (RE = Tb, Er) has been studied by means of magnetometric measurements in the function of temperature and applied magnetic field. The maximum magnetic entropy change ( ) at magnetic flux density change ( ) 0–9 T has been determined to be 5.51 J kg K at 47.4 K for Tb Co In and 14.28 J kg K at 12.3 K for Er Co In , while temperature averaged entropy change (TEC) with 3 K span equals 5.50 and 14.14 J kg K for RE = Tb and Er, respectively. The relative cooling power (RCP) and refrigerant capacity (RC) equal respectively 522.1 and 391.2 J kg in Tb Co In and 605.2 and 463.1 J kg in Er Co In .
用磁强法研究了稀土Co in (RE = Tb, Er)的磁热效应与温度和外加磁场的关系。在磁通量密度变化()0 ~ 9 T时，Tb Co In在47.4 K时的最大磁熵变化()为5.51 J kg K, Er Co In在12.3 K时的最大磁熵变化()为14.28 J kg K，而RE = Tb和Er的3 K跨度温度平均熵变化(TEC)分别为5.50和14.14 J kg K。Tb Co in的相对冷却功率(RCP)和制冷剂容量(RC)分别为522.1和391.2 J kg, Er Co in的相对冷却功率(RCP)和制冷剂容量(RC)分别为605.2和463.1 J kg。
{"title":"Magnetocaloric performance of RE11Co4ln9 (RE = Tb, Er)","authors":"S. Baran, A. R. Hayyu, Y. Tyvanchuk, A. Szytuła","doi":"10.1080/01411594.2022.2149398","DOIUrl":"https://doi.org/10.1080/01411594.2022.2149398","url":null,"abstract":"ABSTRACT The magnetocaloric effect in RE Co In (RE = Tb, Er) has been studied by means of magnetometric measurements in the function of temperature and applied magnetic field. The maximum magnetic entropy change ( ) at magnetic flux density change ( ) 0–9 T has been determined to be 5.51 J kg K at 47.4 K for Tb Co In and 14.28 J kg K at 12.3 K for Er Co In , while temperature averaged entropy change (TEC) with 3 K span equals 5.50 and 14.14 J kg K for RE = Tb and Er, respectively. The relative cooling power (RCP) and refrigerant capacity (RC) equal respectively 522.1 and 391.2 J kg in Tb Co In and 605.2 and 463.1 J kg in Er Co In .","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"115 - 125"},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48856930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-01DOI: 10.1080/01411594.2023.2169609
A. Drzewicz, Łukasz Moczkodan, E. Juszyńska-Gałązka, Małgorzata Jasiurkowska-Delaporte, A. Deptuch
ABSTRACT The phase behaviour and molecular dynamics of the liquid crystal 4-decyl-4’-heptylazoxybenzene (abbreviated as 10AB7) are described by differential scanning calorimetry, polarized optical microscopy, X-ray diffraction and broadband dielectric spectroscopy. Upon fast cooling/heating rates, the 10AB7 forms two liquid crystal phases, nematic and smectic A, as well as two conformationally disordered crystal phases (one of them does not appear on cooling). Upon slow cooling, there is the multiplicity of crystal phases. The dielectric spectra reveal the complex dynamics in the individual thermodynamic states of 10AB7. The Arrhenius type high-frequency relaxation, related with the rotations around the long axes of molecules, is detected for each liquid-like phases and for the high-temperature crystal phase. In the crystal phases there is also the Arrhenius type relaxation associated with the collective motions of molecules combined due to the mutual interactions through NO molecular groups. Additionally, the Vogel–Fulcher–Tammann type process is visible in the low-temperature crystal phase. GRAPHICAL ABSTRACT
{"title":"Phase behaviour and relaxation dynamics of the asymmetric azoxybenzene","authors":"A. Drzewicz, Łukasz Moczkodan, E. Juszyńska-Gałązka, Małgorzata Jasiurkowska-Delaporte, A. Deptuch","doi":"10.1080/01411594.2023.2169609","DOIUrl":"https://doi.org/10.1080/01411594.2023.2169609","url":null,"abstract":"ABSTRACT The phase behaviour and molecular dynamics of the liquid crystal 4-decyl-4’-heptylazoxybenzene (abbreviated as 10AB7) are described by differential scanning calorimetry, polarized optical microscopy, X-ray diffraction and broadband dielectric spectroscopy. Upon fast cooling/heating rates, the 10AB7 forms two liquid crystal phases, nematic and smectic A, as well as two conformationally disordered crystal phases (one of them does not appear on cooling). Upon slow cooling, there is the multiplicity of crystal phases. The dielectric spectra reveal the complex dynamics in the individual thermodynamic states of 10AB7. The Arrhenius type high-frequency relaxation, related with the rotations around the long axes of molecules, is detected for each liquid-like phases and for the high-temperature crystal phase. In the crystal phases there is also the Arrhenius type relaxation associated with the collective motions of molecules combined due to the mutual interactions through NO molecular groups. Additionally, the Vogel–Fulcher–Tammann type process is visible in the low-temperature crystal phase. GRAPHICAL ABSTRACT","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"126 - 138"},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45804817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-01DOI: 10.1080/01411594.2023.2177443
A. Szytuła, S. Baran, J. Chruściel, Wojciech Zając, K. Roleder
After a three-year break due to the pandemic time, the XII National Conference on Neutron Scattering and Complementary Methods in Investigations of Properties of Condensed Phases was held between the 20 and the 22 of June 2022. This conference was organised by the Institute of Chemical Sciences of the Siedlce University of Natural Sciences and Humanities (Siedlce, Poland), Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University (Kraków, Poland), Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences (Kraków, Poland) and the Polish Neutron Scattering Society. The conference has been repeatedly organised since 1997 and used to be held in the ‘Reymontówka’ Rest House for Scientists and Artists at Chlewiska near Siedlce. The venue is a manor-house, originally built for the Różański family in the middle of the 19 century. In 1926, the manor house was purchased by Aurelia, Władysław Reymont’s widow, who spent a part of her husband’s Nobel Prize Award on that. Reymont was awarded this Prize for the novel ‘The Peasants’ in 1924. The conference was aimed at providing a forum for scientists working in neutron science and complementary methods and to enhance contact between scientists from different academic and research centres in Poland. The conference gathered 23 participants from 8 scientific institutions in Kraków, Siedlce, Świerk, Warszawa and Wrocław. The scientific programme consisted of 21 lectures. The speakers focused on properties of liquid crystals and magnetic materials investigated by various experimental methods, particularly using neutron scattering. Perspectives for advanced neutron scattering experiments at the European Spallation Source (ESS) were also presented. This special issue of the Phase Transitions journal contains a selection of the reports presented during the conference. It also provides an opportunity to remember our distinguished colleague Professor Ludwik Dobrzyński, a long-time participant in these conferences. The obituary is included herein. The editors of this issue would like to thank all contributors to this volume. It is also our great pleasure to thank the Editor-in-Chief of Phase Transitions Professor Jens Kreisel and the T&F team, whose efforts and help were invaluable, starting from editorial decisions and throughout the whole production process of this volume.
{"title":"Editors note","authors":"A. Szytuła, S. Baran, J. Chruściel, Wojciech Zając, K. Roleder","doi":"10.1080/01411594.2023.2177443","DOIUrl":"https://doi.org/10.1080/01411594.2023.2177443","url":null,"abstract":"After a three-year break due to the pandemic time, the XII National Conference on Neutron Scattering and Complementary Methods in Investigations of Properties of Condensed Phases was held between the 20 and the 22 of June 2022. This conference was organised by the Institute of Chemical Sciences of the Siedlce University of Natural Sciences and Humanities (Siedlce, Poland), Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University (Kraków, Poland), Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences (Kraków, Poland) and the Polish Neutron Scattering Society. The conference has been repeatedly organised since 1997 and used to be held in the ‘Reymontówka’ Rest House for Scientists and Artists at Chlewiska near Siedlce. The venue is a manor-house, originally built for the Różański family in the middle of the 19 century. In 1926, the manor house was purchased by Aurelia, Władysław Reymont’s widow, who spent a part of her husband’s Nobel Prize Award on that. Reymont was awarded this Prize for the novel ‘The Peasants’ in 1924. The conference was aimed at providing a forum for scientists working in neutron science and complementary methods and to enhance contact between scientists from different academic and research centres in Poland. The conference gathered 23 participants from 8 scientific institutions in Kraków, Siedlce, Świerk, Warszawa and Wrocław. The scientific programme consisted of 21 lectures. The speakers focused on properties of liquid crystals and magnetic materials investigated by various experimental methods, particularly using neutron scattering. Perspectives for advanced neutron scattering experiments at the European Spallation Source (ESS) were also presented. This special issue of the Phase Transitions journal contains a selection of the reports presented during the conference. It also provides an opportunity to remember our distinguished colleague Professor Ludwik Dobrzyński, a long-time participant in these conferences. The obituary is included herein. The editors of this issue would like to thank all contributors to this volume. It is also our great pleasure to thank the Editor-in-Chief of Phase Transitions Professor Jens Kreisel and the T&F team, whose efforts and help were invaluable, starting from editorial decisions and throughout the whole production process of this volume.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"77 - 78"},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46905699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-28DOI: 10.1080/01411594.2023.2168541
A. Deptuch, E. Juszyńska-Gałązka, Małgorzata Jasiurkowska-Delaporte, A. Drzewicz, M. Piwowarczyk, M. Urbańska
ABSTRACT The crystallization of the 3F5FPhF6 compound from the liquid crystalline antiferroelectric smectic CA* phase is investigated in various conditions using differential scanning calorimetry and polarizing optical microscopy. The kinetics of isothermal melt and cold crystallization is studied on the basis of the Avrami model. The kinetics of non-isothermal cold crystallization is analysed using the Ozawa model and the activation energy is determined by the Augis-Bennett, Friedman’s differential isoconversional and Matusita methods. The border temperature between the diffusion-controlled crystallization and thermodynamically-controlled crystallization is estimated. The high fragility index of 105 is determined from the α-process in the smectic CA* phase by the broadband dielectric spectroscopy. The metastable, conformationally disordered crystal phase, forming only via cold crystallization, is reported.
{"title":"Crystallization kinetics in the chiral compound showing the vitrification of the smectic CA* phase for moderate cooling rates","authors":"A. Deptuch, E. Juszyńska-Gałązka, Małgorzata Jasiurkowska-Delaporte, A. Drzewicz, M. Piwowarczyk, M. Urbańska","doi":"10.1080/01411594.2023.2168541","DOIUrl":"https://doi.org/10.1080/01411594.2023.2168541","url":null,"abstract":"ABSTRACT The crystallization of the 3F5FPhF6 compound from the liquid crystalline antiferroelectric smectic CA* phase is investigated in various conditions using differential scanning calorimetry and polarizing optical microscopy. The kinetics of isothermal melt and cold crystallization is studied on the basis of the Avrami model. The kinetics of non-isothermal cold crystallization is analysed using the Ozawa model and the activation energy is determined by the Augis-Bennett, Friedman’s differential isoconversional and Matusita methods. The border temperature between the diffusion-controlled crystallization and thermodynamically-controlled crystallization is estimated. The high fragility index of 105 is determined from the α-process in the smectic CA* phase by the broadband dielectric spectroscopy. The metastable, conformationally disordered crystal phase, forming only via cold crystallization, is reported.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"166 - 185"},"PeriodicalIF":1.6,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48316831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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