Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7156519
Z. Xue, Z. Liu, L. Liu, M. Li, S. He, D. Lee, Y. Guo, A. Yan
Sintered SmCo permanent magnets are widely applied in space, aviation and the military-related industries due to their advantages under high temperature over NdFeB magnets. However, poor mechanical performance compared to their magnetic properties is not satisfactory. The brittleness in manufacturing results in 20-30% of raw materials wasted, which is urged to be solved[1]. For many years, various investigations on their bending strength, impact toughness and thermal expansion have been performed[2-4], but results on an effective method to improve the fracture-resistance are rarely found. In this paper, fracture behavior of sintered (Sm1-xDyx)(Co0.695Fe0. 2Cu0.08Zr0.025)7.2 (x=0, 0.2, 0.4, 0.6, 0.8) magnets are studied and recorded. Highly micro-twins are observed by using transmission electron microscopy (TEM) and indexed by simulated selected area electron diffraction (SAED) patterns. Based on the researches that twinning may contribute to the improvement of bending strength in many metals, the mechanism of anisotropy in mechanical properties is analyzed from the influence of the micro-twin structure and the correlation between mechanical anisotropy and magnetic properties.
{"title":"Anisotropy of mechanical properties of Sm-Co permanent magnets doped with dysprosium","authors":"Z. Xue, Z. Liu, L. Liu, M. Li, S. He, D. Lee, Y. Guo, A. Yan","doi":"10.1109/INTMAG.2015.7156519","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156519","url":null,"abstract":"Sintered SmCo permanent magnets are widely applied in space, aviation and the military-related industries due to their advantages under high temperature over NdFeB magnets. However, poor mechanical performance compared to their magnetic properties is not satisfactory. The brittleness in manufacturing results in 20-30% of raw materials wasted, which is urged to be solved[1]. For many years, various investigations on their bending strength, impact toughness and thermal expansion have been performed[2-4], but results on an effective method to improve the fracture-resistance are rarely found. In this paper, fracture behavior of sintered (Sm1-xDyx)(Co0.695Fe0. 2Cu0.08Zr0.025)7.2 (x=0, 0.2, 0.4, 0.6, 0.8) magnets are studied and recorded. Highly micro-twins are observed by using transmission electron microscopy (TEM) and indexed by simulated selected area electron diffraction (SAED) patterns. Based on the researches that twinning may contribute to the improvement of bending strength in many metals, the mechanism of anisotropy in mechanical properties is analyzed from the influence of the micro-twin structure and the correlation between mechanical anisotropy and magnetic properties.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128243215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157299
L. Xu, M. Lin, X. Fu
As the complexity of modern industrial drive systems, the two degree of freedom (2-DOF) operation is needed in the many industry drive applications. Linear rotary permanent magnet (LRPM) motor with the simple structure, high power/mass ratio and good dynamic performance has been presented for 2-DOF motion in recent years. A novel double stator linear and rotary permanent magnet (DSPLRPM) motor is proposed in this paper. The equivalent magnetic circuit model (EMCM) of the motor is established, and the magnetic field is analyzed. The results are confirmed by that of 3D finite element analysis (FEA).
{"title":"Magnetic field analysis of a novel double stator linear-rotary permanent magnet motor","authors":"L. Xu, M. Lin, X. Fu","doi":"10.1109/INTMAG.2015.7157299","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157299","url":null,"abstract":"As the complexity of modern industrial drive systems, the two degree of freedom (2-DOF) operation is needed in the many industry drive applications. Linear rotary permanent magnet (LRPM) motor with the simple structure, high power/mass ratio and good dynamic performance has been presented for 2-DOF motion in recent years. A novel double stator linear and rotary permanent magnet (DSPLRPM) motor is proposed in this paper. The equivalent magnetic circuit model (EMCM) of the motor is established, and the magnetic field is analyzed. The results are confirmed by that of 3D finite element analysis (FEA).","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"55 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128355075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157085
J. Gifford, B. Chen, J. Zhang, G. Zhao, D. Kim, D. Wu, T. Chen
In this paper, the Andreev reflection method which employs magnetic materials with various spin polarization has been used to study the superconductivity of SmO0.82F0.18FeAs. It is shown that this method can be utilized to measure the spin of Cooper pairs if a highly spin polarized current is used.
{"title":"Singlet superconductivity in SmO0.82F0.18FeAs","authors":"J. Gifford, B. Chen, J. Zhang, G. Zhao, D. Kim, D. Wu, T. Chen","doi":"10.1109/INTMAG.2015.7157085","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157085","url":null,"abstract":"In this paper, the Andreev reflection method which employs magnetic materials with various spin polarization has been used to study the superconductivity of SmO0.82F0.18FeAs. It is shown that this method can be utilized to measure the spin of Cooper pairs if a highly spin polarized current is used.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128362670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157144
M. Zhang, D. Wei, K. Gao
Spin-torque oscillator (STO) with reference layer (REF) has been proposed to be an efficient way to excite oscillation at low current density. A well-controlled STO is the center part of microwave assisted magnetic recording (MAMR); however, in the recording process, the STO is exposed in an alternative external head field in addition to the applied current. To assist the writing in MAMR, the STO should switch and change the oscillation chirality when the head pole flips, and the switching time needs to be shorter than 0.2 ns so as to follow the write field flipping. In this work, we would like to find the suitable design of Co/Pt REF to achieve this target.
{"title":"Micromagnetic studies on switching dynamics of spin-torque oscillators","authors":"M. Zhang, D. Wei, K. Gao","doi":"10.1109/INTMAG.2015.7157144","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157144","url":null,"abstract":"Spin-torque oscillator (STO) with reference layer (REF) has been proposed to be an efficient way to excite oscillation at low current density. A well-controlled STO is the center part of microwave assisted magnetic recording (MAMR); however, in the recording process, the STO is exposed in an alternative external head field in addition to the applied current. To assist the writing in MAMR, the STO should switch and change the oscillation chirality when the head pole flips, and the switching time needs to be shorter than 0.2 ns so as to follow the write field flipping. In this work, we would like to find the suitable design of Co/Pt REF to achieve this target.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128716317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7156774
Z. Jirák, M. Kačenka, O. Kaman, M. Maryško, N. Belozerova, S. Kichanov, D. Kozlenko
The ferromagnetic La1-xSrxMnO3+δ particles have recently been prepared from the flux of sodium nitrite at ≈500°C [1,2]. The advantage of this facile method is the high yield of cubic-shape nanocrystals without a very fine matter that is common for an alternative preparation via sol-gel route. The size of the as-prepared nanoparticles is ≈50 nm. A detailed magnetic study, including the neutron diffraction at zero and high pressures, has been performed on as-prepared particles of compositions x=0 .28 and 0 .37. Based on these experiments we conclude that as-prepared manganite particles show certain oxygen excess δ>0 that can be ascribed mainly to the surface oxygen chemisorption [3]. As a consequence the valence of Mn ions is shifted toward a higher oxidation state and this shift has probably a pronounced radial distribution in the particles, reaching possibly pure Mn4+ at the uppermost surface layers. We suggest that such overdoping is the true reason for “magnetically dead” shell in the manganite nanoparticles and is also the source of surface stress that compresses the particle core and modifies its physical properties. Such compressive stress drives the magnetic ground state of x=0 .37 particles towards a mixture of FM and A-type AFM ordering. In the x=0 .28 particles, only the FM phase is observed (M1000kA/m(4.5 K)=59.7 Am2/kg, TC=319 K), but an A-type AFM component can be induced by application of high external pressures. Our observations are interpreted based on so-called t-J hamiltonian that takes into account the superexchange between localized t2g spins (S=3/2) and the double exchange mediated by itinerant eg carriers (s=1/2) of Mn3+/Mn4+ perovskite lattice [4].
{"title":"Role of surface on magnetic properties of La1−xSrxΜn03+δ nanocrystallites","authors":"Z. Jirák, M. Kačenka, O. Kaman, M. Maryško, N. Belozerova, S. Kichanov, D. Kozlenko","doi":"10.1109/INTMAG.2015.7156774","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156774","url":null,"abstract":"The ferromagnetic La1-xSrxMnO3+δ particles have recently been prepared from the flux of sodium nitrite at ≈500°C [1,2]. The advantage of this facile method is the high yield of cubic-shape nanocrystals without a very fine matter that is common for an alternative preparation via sol-gel route. The size of the as-prepared nanoparticles is ≈50 nm. A detailed magnetic study, including the neutron diffraction at zero and high pressures, has been performed on as-prepared particles of compositions x=0 .28 and 0 .37. Based on these experiments we conclude that as-prepared manganite particles show certain oxygen excess δ>0 that can be ascribed mainly to the surface oxygen chemisorption [3]. As a consequence the valence of Mn ions is shifted toward a higher oxidation state and this shift has probably a pronounced radial distribution in the particles, reaching possibly pure Mn4+ at the uppermost surface layers. We suggest that such overdoping is the true reason for “magnetically dead” shell in the manganite nanoparticles and is also the source of surface stress that compresses the particle core and modifies its physical properties. Such compressive stress drives the magnetic ground state of x=0 .37 particles towards a mixture of FM and A-type AFM ordering. In the x=0 .28 particles, only the FM phase is observed (M1000kA/m(4.5 K)=59.7 Am2/kg, TC=319 K), but an A-type AFM component can be induced by application of high external pressures. Our observations are interpreted based on so-called t-J hamiltonian that takes into account the superexchange between localized t2g spins (S=3/2) and the double exchange mediated by itinerant eg carriers (s=1/2) of Mn3+/Mn4+ perovskite lattice [4].","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129044229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7156806
J. Yuan, Z. Yu
Short-circuit impedance (SCI) method have been widely used for winding deformation detection. However, the short-circuit impedance method at present still lack the adequate theoretical analysis mechanism to determine the deformation extent, also unable to quantify the deformation accurately. To improve the judging mechanism, analysis of the relationship between leakage reactance variation and winding deformation is essential. In this digest, the leakage reactance of a simplified transformer is calculated by theoretical derivation first. Then, a proportional model is established based on Finite Element Method (FEM), and simulations of a variety of complex deformation are conducted. The accuracy of the method is verified by the corresponding test results, which offers helpful guidance for short-circuit impedance method.
{"title":"Research of transformer winding deformation based on Finite Element Method","authors":"J. Yuan, Z. Yu","doi":"10.1109/INTMAG.2015.7156806","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156806","url":null,"abstract":"Short-circuit impedance (SCI) method have been widely used for winding deformation detection. However, the short-circuit impedance method at present still lack the adequate theoretical analysis mechanism to determine the deformation extent, also unable to quantify the deformation accurately. To improve the judging mechanism, analysis of the relationship between leakage reactance variation and winding deformation is essential. In this digest, the leakage reactance of a simplified transformer is calculated by theoretical derivation first. Then, a proportional model is established based on Finite Element Method (FEM), and simulations of a variety of complex deformation are conducted. The accuracy of the method is verified by the corresponding test results, which offers helpful guidance for short-circuit impedance method.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124559841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157683
K. Min, J. Choi, H. Cho, H. Shin
A spur gear is the most common type of gears. They are mounted on parallel shafts. Mechanical spur gears, which play important roles in transmission systems, inherently suffer from the drawbacks of high transmission loss, bulky size, high noise, wear-and-tear. Magnetic spur gears can readily replace mechanical spur gears. Magnetic spur gears have no cut teeth or cogs and they are magnetically coupled by each magnet, therefore, they offer the advantage of isolation, maintenance-free, silent operation and inherent overload protection. These magnetic spur gears have a great potential for medical and chemical applications and micro-transmission systems. This paper discusses the analysis of torque for a magnetic spur gear that uses a Halbach array permanent magnet (PM) using an analytical method. This analytical method has a faster analysis speed than the finite element method (FEM), which is typically used to analyze spur gears and is appropriate for initial design process.
{"title":"Torque analysis of magnetic spur gear with halbach magnetized permanent magnets using an analytical method","authors":"K. Min, J. Choi, H. Cho, H. Shin","doi":"10.1109/INTMAG.2015.7157683","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157683","url":null,"abstract":"A spur gear is the most common type of gears. They are mounted on parallel shafts. Mechanical spur gears, which play important roles in transmission systems, inherently suffer from the drawbacks of high transmission loss, bulky size, high noise, wear-and-tear. Magnetic spur gears can readily replace mechanical spur gears. Magnetic spur gears have no cut teeth or cogs and they are magnetically coupled by each magnet, therefore, they offer the advantage of isolation, maintenance-free, silent operation and inherent overload protection. These magnetic spur gears have a great potential for medical and chemical applications and micro-transmission systems. This paper discusses the analysis of torque for a magnetic spur gear that uses a Halbach array permanent magnet (PM) using an analytical method. This analytical method has a faster analysis speed than the finite element method (FEM), which is typically used to analyze spur gears and is appropriate for initial design process.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124595810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7156982
H. Chen, X. Liu, J. Zhao
In order to get a better dynamic response for actuator in condition of low-speed, a permanent magnet synchronous motor (PMSM) in direct-drive application with the characteristics of high-bandwidth, low-speed and high-torque was designed and researched in this paper.
{"title":"Design and optimization of a high-bandwidth low-speed high-torque permanent magnet synchronous motor","authors":"H. Chen, X. Liu, J. Zhao","doi":"10.1109/INTMAG.2015.7156982","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7156982","url":null,"abstract":"In order to get a better dynamic response for actuator in condition of low-speed, a permanent magnet synchronous motor (PMSM) in direct-drive application with the characteristics of high-bandwidth, low-speed and high-torque was designed and researched in this paper.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129445964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157675
R. Tolley, T. Liu, T. Hauet, M. Hehn, G. Lengaigne, E. Fullerton, S. Mangin
Recently, the manipulation of domain walls using magnetic field [1] spin polarized current [2] electric field [3] and temperature gradient [4] have attracted significant interest. This control of domain wall nucleation and propagation could lead to new advances in the field of data storage [5] and magnetic logic [6]. Here we report on the use of a thermal gradient to nucleate, propagate and annihilate well-defined domain walls. The domain walls are created in lithographically patterned wires of amorphous, ferrimagnetic CoTb alloy thin films. The net magnetization of these films is defined by the competition between the magnetization of the antiferromagnetically coupled Co sublattice and Tb sublattice. For some compositions, there exists a given temperature known as the compensation temperature (Tcomp), where the net saturation magnetization of the sample is zero due to the equal magnitude and opposite direction of the two competing sublattice moments. Below Tcomp, the net magnetization of the film aligns along the dominant Tb magnetization, while above Tcomp the direction of the magnetization is controlled by the Co sublattice. By crossing this compensation temperature under applied field, it is possible to change the dominant sublattice - creating a shift in the net magnetization direction of the film.
{"title":"Control and generation of domain walls near magnetic compensation in ferrimagnetic CoTb via applied thermal gradient","authors":"R. Tolley, T. Liu, T. Hauet, M. Hehn, G. Lengaigne, E. Fullerton, S. Mangin","doi":"10.1109/INTMAG.2015.7157675","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157675","url":null,"abstract":"Recently, the manipulation of domain walls using magnetic field [1] spin polarized current [2] electric field [3] and temperature gradient [4] have attracted significant interest. This control of domain wall nucleation and propagation could lead to new advances in the field of data storage [5] and magnetic logic [6]. Here we report on the use of a thermal gradient to nucleate, propagate and annihilate well-defined domain walls. The domain walls are created in lithographically patterned wires of amorphous, ferrimagnetic CoTb alloy thin films. The net magnetization of these films is defined by the competition between the magnetization of the antiferromagnetically coupled Co sublattice and Tb sublattice. For some compositions, there exists a given temperature known as the compensation temperature (Tcomp), where the net saturation magnetization of the sample is zero due to the equal magnitude and opposite direction of the two competing sublattice moments. Below Tcomp, the net magnetization of the film aligns along the dominant Tb magnetization, while above Tcomp the direction of the magnetization is controlled by the Co sublattice. By crossing this compensation temperature under applied field, it is possible to change the dominant sublattice - creating a shift in the net magnetization direction of the film.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130378271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-11DOI: 10.1109/INTMAG.2015.7157039
C. Li, J. Liu, S. Zhang, G. Lefkidis, W. Hubner
In recent years, the endohedral metallofullerenes have drawn wide attention of scientists and given new impetus to the efforts toward the practical application in novel single molecular devices [1-2]. Especially, as single-molecule magnets, endohedral fullerenes can realize robust and chemically protected spin systems, and are promising candidates for molecular spintronics owing to their long magnetic relaxation times [3]. The research on spin dynamics of endohedral fullerenes is worthy and imperative, but still scarce. Here, we take one- and two-magnetic-center Co-doped carbon fullerenes, specifically [Co@C60]+ and Co2@C60, as examples to study their ultrafast, laser-induced, spin dynamics through ab initio calculations. The strain modulation on the spin-switching behavior is also explored.
{"title":"Investigation of the strain-affected ultrafast spin switching on cobalt-doped carbon fullerenes","authors":"C. Li, J. Liu, S. Zhang, G. Lefkidis, W. Hubner","doi":"10.1109/INTMAG.2015.7157039","DOIUrl":"https://doi.org/10.1109/INTMAG.2015.7157039","url":null,"abstract":"In recent years, the endohedral metallofullerenes have drawn wide attention of scientists and given new impetus to the efforts toward the practical application in novel single molecular devices [1-2]. Especially, as single-molecule magnets, endohedral fullerenes can realize robust and chemically protected spin systems, and are promising candidates for molecular spintronics owing to their long magnetic relaxation times [3]. The research on spin dynamics of endohedral fullerenes is worthy and imperative, but still scarce. Here, we take one- and two-magnetic-center Co-doped carbon fullerenes, specifically [Co@C60]+ and Co2@C60, as examples to study their ultrafast, laser-induced, spin dynamics through ab initio calculations. The strain modulation on the spin-switching behavior is also explored.","PeriodicalId":381832,"journal":{"name":"2015 IEEE Magnetics Conference (INTERMAG)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126797370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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