Pub Date : 2020-01-28DOI: 10.1149/ma2020-02683568mtgabs
Tsuyoshi Kawamoto, N. Ishida, N. Kitamura, Y. Idemoto
{"title":"Effect of Mo, W Substitution on Ferroelectric Characteristics, Crystal and Electronic Structure of Bi0.5K0.5TiO3-BiFeO3-KTaO3 Based Ferroelectric Ceramics","authors":"Tsuyoshi Kawamoto, N. Ishida, N. Kitamura, Y. Idemoto","doi":"10.1149/ma2020-02683568mtgabs","DOIUrl":"https://doi.org/10.1149/ma2020-02683568mtgabs","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86047438","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}
S. Kishida, D. Matsuo, T. Ikeda, Y. Setoguchi, Y. Andoh
{"title":"Inductively Coupled Plasma Sputtering System for Oxide Semiconductors for a Large Area Deposition","authors":"S. Kishida, D. Matsuo, T. Ikeda, Y. Setoguchi, Y. Andoh","doi":"10.36463/IDW.2020.0331","DOIUrl":"https://doi.org/10.36463/IDW.2020.0331","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80031976","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 : 2020-01-28DOI: 10.1149/ma2020-02261818mtgabs
M. Toguchi, K. Miwa, F. Horikiri, N. Fukuhara, Y. Narita, O. Ichikawa, R. Isono, Takeshi Tanaka, Taketomo Sato
{"title":"Fabrication of Recessed-Gate AlGaN/GaN Hemts Utilizing Contactless Photo-Electrochemical (CL-PEC) Etching","authors":"M. Toguchi, K. Miwa, F. Horikiri, N. Fukuhara, Y. Narita, O. Ichikawa, R. Isono, Takeshi Tanaka, Taketomo Sato","doi":"10.1149/ma2020-02261818mtgabs","DOIUrl":"https://doi.org/10.1149/ma2020-02261818mtgabs","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78810413","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 : 2020-01-28DOI: 10.21203/RS.3.RS-156385/V1
S. Khanom, N. Hayashi
Zinc ion dissolved in water is attempted to be removed by generating the oxides of zinc using the oxygen gas in DBD plasma system. The removal rate of zinc oxides’ production (ZnO and Zn(OH2)) were measured at different treatment periods by the oxygen plasma penetration in water. The removal rate of the deposit increases initially and then decreases with the treatment period. The maximum removal rate (29%) of zinc from water is achieved at the treatment period of 10 min, where pH is minimum. From FTIR the generation properties of zinc oxide can be recognized. Initially the amount the deposit increases with the ozone treatment period due to production of both ZnO and Zn(OH)2. After that, the production of Zn(OH)42- increases even when the total removal rate of the deposit decreases. Therefore, to remove zinc ion from water forming metal oxide deposit, the penetration amount of the active oxygens to the water must be controlled to keep the pH lower than around 7.5. Because with increasing pH amount of removal rate of ZnO deposit decreases. The pH of the zinc dissolved water treated by ozone depends on both zinc and ozone concentration in water.
{"title":"Removal of Metal Ions from Water Using Oxygen Plasmas","authors":"S. Khanom, N. Hayashi","doi":"10.21203/RS.3.RS-156385/V1","DOIUrl":"https://doi.org/10.21203/RS.3.RS-156385/V1","url":null,"abstract":"\u0000 Zinc ion dissolved in water is attempted to be removed by generating the oxides of zinc using the oxygen gas in DBD plasma system. The removal rate of zinc oxides’ production (ZnO and Zn(OH2)) were measured at different treatment periods by the oxygen plasma penetration in water. The removal rate of the deposit increases initially and then decreases with the treatment period. The maximum removal rate (29%) of zinc from water is achieved at the treatment period of 10 min, where pH is minimum. From FTIR the generation properties of zinc oxide can be recognized. Initially the amount the deposit increases with the ozone treatment period due to production of both ZnO and Zn(OH)2. After that, the production of Zn(OH)42- increases even when the total removal rate of the deposit decreases. Therefore, to remove zinc ion from water forming metal oxide deposit, the penetration amount of the active oxygens to the water must be controlled to keep the pH lower than around 7.5. Because with increasing pH amount of removal rate of ZnO deposit decreases. The pH of the zinc dissolved water treated by ozone depends on both zinc and ozone concentration in water.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82409751","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}
M. Koshimizu, Y. Muroya, S. Yamashita, M. Nogami, K. Hitomi, Y. Fujimoto, K. Asai
1Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan 2Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan 3Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1188, Japan 4Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, 6-6-01-2 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
{"title":"Transient Absorption Spectroscopy of TlBr Crystals Using Pulsed Electron Beams","authors":"M. Koshimizu, Y. Muroya, S. Yamashita, M. Nogami, K. Hitomi, Y. Fujimoto, K. Asai","doi":"10.18494/sam.2020.2754","DOIUrl":"https://doi.org/10.18494/sam.2020.2754","url":null,"abstract":"1Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan 2Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan 3Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1188, Japan 4Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, 6-6-01-2 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75785805","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 : 2020-01-09DOI: 10.1103/PHYSREVA.102.011501
N. Takemura, M. Takiguchi, H. Sumikura, E. Kuramochi, A. Shinya, M. Notomi
We performed measurements of the photon correlation $[{g}^{(2)}(ensuremath{tau})]$ in driven nonlinear high-$Q$ silicon photonic crystal microcavities. The measured ${g}^{(2)}(ensuremath{tau})$ exhibits damped oscillatory behavior when the input pump power exceeds a critical value. From a comparison between experiments and simulations, we attribute the measured oscillation of ${g}^{(2)}(ensuremath{tau})$ to self-pulsing (a limit cycle) emerging from an interplay between the photon, carrier, and thermal dynamics. Namely, the oscillation frequency of ${g}^{(2)}(ensuremath{tau})$ corresponds to the oscillation period of the limit cycle, while its finite coherence (damping) time originates from the stochastic nature of the limit cycle. From the standpoint of phase reduction theory, we interpret the measured coherence time of ${g}^{(2)}(ensuremath{tau})$ as the coherence (diffusion) time of a generalized phase of the limit cycle. Furthermore, we show that an increase in laser input power enhances the coherence time of ${g}^{(2)}(ensuremath{tau})$ up to the order of microseconds, which could be a demonstration of the stabilization of a stochastic limit cycle through pumping.
{"title":"Photon-correlation measurements of stochastic limit cycles emerging from high-\u0000Q\u0000 nonlinear silicon photonic crystal microcavities","authors":"N. Takemura, M. Takiguchi, H. Sumikura, E. Kuramochi, A. Shinya, M. Notomi","doi":"10.1103/PHYSREVA.102.011501","DOIUrl":"https://doi.org/10.1103/PHYSREVA.102.011501","url":null,"abstract":"We performed measurements of the photon correlation $[{g}^{(2)}(ensuremath{tau})]$ in driven nonlinear high-$Q$ silicon photonic crystal microcavities. The measured ${g}^{(2)}(ensuremath{tau})$ exhibits damped oscillatory behavior when the input pump power exceeds a critical value. From a comparison between experiments and simulations, we attribute the measured oscillation of ${g}^{(2)}(ensuremath{tau})$ to self-pulsing (a limit cycle) emerging from an interplay between the photon, carrier, and thermal dynamics. Namely, the oscillation frequency of ${g}^{(2)}(ensuremath{tau})$ corresponds to the oscillation period of the limit cycle, while its finite coherence (damping) time originates from the stochastic nature of the limit cycle. From the standpoint of phase reduction theory, we interpret the measured coherence time of ${g}^{(2)}(ensuremath{tau})$ as the coherence (diffusion) time of a generalized phase of the limit cycle. Furthermore, we show that an increase in laser input power enhances the coherence time of ${g}^{(2)}(ensuremath{tau})$ up to the order of microseconds, which could be a demonstration of the stabilization of a stochastic limit cycle through pumping.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90732888","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 : 2019-07-10DOI: 10.1103/physrevb.102.020410
R. Kohno, J. Sampaio, S. Rohart, A. Thiaville
The effect of damping-like spin-orbit torque (DL SOT) on magnetic domain walls (DWs) in in-plane magnetised soft tracks is studied analytically and with micromagnetic simulations. We find that DL SOT drives vortex DWs, whereas transverse DWs, the other typical DW structure in soft tracks, propagate only if the Dzyaloshinskii-Moriya interaction (DMI) is present. The SOT drive can add to, and be more efficient than, spin-transfer torque (STT), and so may greatly benefit applications that require in-plane DWs. Our analysis based on the Thiele equation shows that the driving force arises from a cycloidal distortion of the DW structure caused by geometrical confinement or DMI. This distortion is higher, and the SOT more efficient, in narrower, thinner tracks. These results show that the effects of SOT cannot be understood by simply considering the effective field at the center of the structure, an ill-founded but often-used estimation. We also show that the relative magnitude of STT and DL SOT can be determined by comparing the motion of different vortex DW structures in the same track.
{"title":"Domain wall propagation by spin-orbit torques in in-plane magnetized systems","authors":"R. Kohno, J. Sampaio, S. Rohart, A. Thiaville","doi":"10.1103/physrevb.102.020410","DOIUrl":"https://doi.org/10.1103/physrevb.102.020410","url":null,"abstract":"The effect of damping-like spin-orbit torque (DL SOT) on magnetic domain walls (DWs) in in-plane magnetised soft tracks is studied analytically and with micromagnetic simulations. We find that DL SOT drives vortex DWs, whereas transverse DWs, the other typical DW structure in soft tracks, propagate only if the Dzyaloshinskii-Moriya interaction (DMI) is present. The SOT drive can add to, and be more efficient than, spin-transfer torque (STT), and so may greatly benefit applications that require in-plane DWs. Our analysis based on the Thiele equation shows that the driving force arises from a cycloidal distortion of the DW structure caused by geometrical confinement or DMI. This distortion is higher, and the SOT more efficient, in narrower, thinner tracks. These results show that the effects of SOT cannot be understood by simply considering the effective field at the center of the structure, an ill-founded but often-used estimation. We also show that the relative magnitude of STT and DL SOT can be determined by comparing the motion of different vortex DW structures in the same track.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76947346","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}
Yuhi Fujishiro, M. Kawahara, Tsuyoshi Samura, T. Tachiki, T. Uchida
{"title":"Investigation of Fabrication Conditions for VO2 Thin Films by MOD using Carbon Thermal Reduction","authors":"Yuhi Fujishiro, M. Kawahara, Tsuyoshi Samura, T. Tachiki, T. Uchida","doi":"10.1541/ieejfms.141.64","DOIUrl":"https://doi.org/10.1541/ieejfms.141.64","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88408437","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}
K. Vihanga De Zoysa, S. DuttaGupta, Ryuichi Itoh, Y. Takeuchi, H. Ohno, S. Fukami
We investigate spin–orbit torques (SOTs) in heterostructures with Pt1−xMnx alloy and CoFeB as a function of Mn composition (x) by using an extended harmonic Hall measurement. Slonczewski-like and field-like SOT efficiencies ( ξ SL and ξ FL) show non-monotonic variation and a different trend with respect to x, and considerably large ξ SL up to 0.21 is obtained at x = 0.20. Compared to the x dependence of longitudinal resistivity, the Slonczewski-like SOT in the low x region is mainly attributed to an intrinsic spin-Hall mechanism, whereas a non-monotonic variation in the higher x region suggests the presence of additional factors. The present findings deliver useful clues to understand the physics behind SOT generation in antiferromagnetic heterostructures and offer a route to realize efficient devices.
{"title":"Composition dependence of spin−orbit torque in Pt1−xMnx/CoFeB heterostructures","authors":"K. Vihanga De Zoysa, S. DuttaGupta, Ryuichi Itoh, Y. Takeuchi, H. Ohno, S. Fukami","doi":"10.1063/5.0011448","DOIUrl":"https://doi.org/10.1063/5.0011448","url":null,"abstract":"We investigate spin–orbit torques (SOTs) in heterostructures with Pt1−xMnx alloy and CoFeB as a function of Mn composition (x) by using an extended harmonic Hall measurement. Slonczewski-like and field-like SOT efficiencies ( ξ SL and ξ FL) show non-monotonic variation and a different trend with respect to x, and considerably large ξ SL up to 0.21 is obtained at x = 0.20. Compared to the x dependence of longitudinal resistivity, the Slonczewski-like SOT in the low x region is mainly attributed to an intrinsic spin-Hall mechanism, whereas a non-monotonic variation in the higher x region suggests the presence of additional factors. The present findings deliver useful clues to understand the physics behind SOT generation in antiferromagnetic heterostructures and offer a route to realize efficient devices.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87665080","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 : 2019-07-10DOI: 10.1016/j.bpj.2019.11.979
K. Enomoto, Y. Ishikawa, K. Esashika, T. Saiki
{"title":"Optical Observation of DNA Translocation Dynamics in SiN Nanopores","authors":"K. Enomoto, Y. Ishikawa, K. Esashika, T. Saiki","doi":"10.1016/j.bpj.2019.11.979","DOIUrl":"https://doi.org/10.1016/j.bpj.2019.11.979","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74156368","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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