T. Ide, N. Imaoka, Mikio Oomori, K. Ozaki, M. Shimizu, N. Takada
In this study, the Nd–Fe–N materials are employed as an electromagnetic shield, for the first time, for the resonance coil in the 13.56-MHz-GaN wireless power transmission circuit. The Nd–Fe–N materials are introduced into the air-core resonance coil as the cap of the edges or the core. By using Nd–Fe–N, the radiated emission from the resonance coil is reduced because the electromagnetic field distribution is shrunk due to the effect of not the imaginary part but the real part of the permeability. When the spectrum of the magnetic field of the resonance coil is measured at the frequency from 30 MHz to 800 MHz, the intensity of the higher harmonics radiated emission is restricted by Nd–Fe–N in all of the frequency ranges. In particular, the Nd–Fe–N capped air-core coil shows the superior characteristics in both the shielding effect and the power loss. In addition, by numerical calculation, it is found that the effect of the electromagnetic shield will be enhanced by increasing the real part of the permeability by optimizing the Nd–Fe–N material fabrication.In this study, the Nd–Fe–N materials are employed as an electromagnetic shield, for the first time, for the resonance coil in the 13.56-MHz-GaN wireless power transmission circuit. The Nd–Fe–N materials are introduced into the air-core resonance coil as the cap of the edges or the core. By using Nd–Fe–N, the radiated emission from the resonance coil is reduced because the electromagnetic field distribution is shrunk due to the effect of not the imaginary part but the real part of the permeability. When the spectrum of the magnetic field of the resonance coil is measured at the frequency from 30 MHz to 800 MHz, the intensity of the higher harmonics radiated emission is restricted by Nd–Fe–N in all of the frequency ranges. In particular, the Nd–Fe–N capped air-core coil shows the superior characteristics in both the shielding effect and the power loss. In addition, by numerical calculation, it is found that the effect of the electromagnetic shield will be enhanced by increasing the real part of the permeabi...
{"title":"Reduction of radiated emission from resonance coil in GaN wireless power transmission circuit by using Nd–Fe–N magnetic material","authors":"T. Ide, N. Imaoka, Mikio Oomori, K. Ozaki, M. Shimizu, N. Takada","doi":"10.1063/1.5131141","DOIUrl":"https://doi.org/10.1063/1.5131141","url":null,"abstract":"In this study, the Nd–Fe–N materials are employed as an electromagnetic shield, for the first time, for the resonance coil in the 13.56-MHz-GaN wireless power transmission circuit. The Nd–Fe–N materials are introduced into the air-core resonance coil as the cap of the edges or the core. By using Nd–Fe–N, the radiated emission from the resonance coil is reduced because the electromagnetic field distribution is shrunk due to the effect of not the imaginary part but the real part of the permeability. When the spectrum of the magnetic field of the resonance coil is measured at the frequency from 30 MHz to 800 MHz, the intensity of the higher harmonics radiated emission is restricted by Nd–Fe–N in all of the frequency ranges. In particular, the Nd–Fe–N capped air-core coil shows the superior characteristics in both the shielding effect and the power loss. In addition, by numerical calculation, it is found that the effect of the electromagnetic shield will be enhanced by increasing the real part of the permeability by optimizing the Nd–Fe–N material fabrication.In this study, the Nd–Fe–N materials are employed as an electromagnetic shield, for the first time, for the resonance coil in the 13.56-MHz-GaN wireless power transmission circuit. The Nd–Fe–N materials are introduced into the air-core resonance coil as the cap of the edges or the core. By using Nd–Fe–N, the radiated emission from the resonance coil is reduced because the electromagnetic field distribution is shrunk due to the effect of not the imaginary part but the real part of the permeability. When the spectrum of the magnetic field of the resonance coil is measured at the frequency from 30 MHz to 800 MHz, the intensity of the higher harmonics radiated emission is restricted by Nd–Fe–N in all of the frequency ranges. In particular, the Nd–Fe–N capped air-core coil shows the superior characteristics in both the shielding effect and the power loss. In addition, by numerical calculation, it is found that the effect of the electromagnetic shield will be enhanced by increasing the real part of the permeabi...","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87301276","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 : 2019-01-25DOI: 10.1016/j.radmeas.2020.106341
Takumi Kato, Yuma Takebuchi, D. Nakauchi, N. Kawaguchi, T. Yanagida
{"title":"Dosimetric properties of undoped and Tb-doped MgAl2O4 transparent ceramics","authors":"Takumi Kato, Yuma Takebuchi, D. Nakauchi, N. Kawaguchi, T. Yanagida","doi":"10.1016/j.radmeas.2020.106341","DOIUrl":"https://doi.org/10.1016/j.radmeas.2020.106341","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76060201","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 : 2018-11-09DOI: 10.3390/proceedings2131034
N. Hasuike, S. Ochiai, R. Iwakiri, M. Takeda, W. Yoo, T. Isshiki
We newly proposed transparent conductive oxide with diffraction grating structure as an excitation field of surface plasmon resonance working at near-infrared spectral region. We experimentally demonstrated the excitation of SPR using Sn-doped In2O3 films with micro-meter pitched diffraction grating. In this study, we considered the correlation between the grating pitch and the optical reflection spectra. Reflection spectra showed clear polarization properties in infrared spectral region, and the reflection edge has also correlation with the pitch of grating. From these results, the excitation of SPR grating was successfully demonstrated and the wavelength can be tuned by changing the grating pitch in infrared region.
{"title":"Surface Plasmon Resonances in Sn: In2O3 Thin Films with Diffraction Grating","authors":"N. Hasuike, S. Ochiai, R. Iwakiri, M. Takeda, W. Yoo, T. Isshiki","doi":"10.3390/proceedings2131034","DOIUrl":"https://doi.org/10.3390/proceedings2131034","url":null,"abstract":"We newly proposed transparent conductive oxide with diffraction grating structure as an excitation field of surface plasmon resonance working at near-infrared spectral region. We experimentally demonstrated the excitation of SPR using Sn-doped In2O3 films with micro-meter pitched diffraction grating. In this study, we considered the correlation between the grating pitch and the optical reflection spectra. Reflection spectra showed clear polarization properties in infrared spectral region, and the reflection edge has also correlation with the pitch of grating. From these results, the excitation of SPR grating was successfully demonstrated and the wavelength can be tuned by changing the grating pitch in infrared region.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"1 1","pages":"1034"},"PeriodicalIF":0.0,"publicationDate":"2018-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79807143","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 : 2018-07-10DOI: 10.1007/978-3-319-98267-0_5
K. Okamura
{"title":"An Approach from Measurement Theory to Dressed Photon","authors":"K. Okamura","doi":"10.1007/978-3-319-98267-0_5","DOIUrl":"https://doi.org/10.1007/978-3-319-98267-0_5","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"40 2 1","pages":"137-167"},"PeriodicalIF":0.0,"publicationDate":"2018-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75864785","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 : 2018-07-10DOI: 10.1103/physrevapplied.13.014045
Tatsuya Yamamoto, T. Nozaki, H. Imamura, S. Tamaru, K. Yakushiji, H. Kubota, A. Fukushima, Yoshishige Suzuki, S. Yuasa
We study the influence of inverse biases applied before and after a write pulse on the write-error rate (WER) of voltage-driven magnetization switching in magnetic tunnel junctions. It is demonstrated that the inverse bias applied after the write pulse is effective not only for improving the minimum value of the WER but also for broadening the operating pulse-width window. In contrast, an inverse bias applied before the write pulse hardly improves the WER or even narrows the operating window. Numerical simulations based on the macrospin approximation reproduce these experimental results well and a detailed analysis of the magnetization trajectory reveals that the observed write-error increase is due to a change in the magnetization angle before writing. These experimental results, as well as the numerical analysis, should facilitate the development of writing schemes in voltage-driven magnetic random-access memories.
{"title":"Voltage-Driven Magnetization Switching Using Inverse-Bias Schemes","authors":"Tatsuya Yamamoto, T. Nozaki, H. Imamura, S. Tamaru, K. Yakushiji, H. Kubota, A. Fukushima, Yoshishige Suzuki, S. Yuasa","doi":"10.1103/physrevapplied.13.014045","DOIUrl":"https://doi.org/10.1103/physrevapplied.13.014045","url":null,"abstract":"We study the influence of inverse biases applied before and after a write pulse on the write-error rate (WER) of voltage-driven magnetization switching in magnetic tunnel junctions. It is demonstrated that the inverse bias applied after the write pulse is effective not only for improving the minimum value of the WER but also for broadening the operating pulse-width window. In contrast, an inverse bias applied before the write pulse hardly improves the WER or even narrows the operating window. Numerical simulations based on the macrospin approximation reproduce these experimental results well and a detailed analysis of the magnetization trajectory reveals that the observed write-error increase is due to a change in the magnetization angle before writing. These experimental results, as well as the numerical analysis, should facilitate the development of writing schemes in voltage-driven magnetic random-access memories.","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83182712","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 : 2018-07-10DOI: 10.1299/JSMERMD.2018.1P1-J08
T. Takamatsu, Lu Chen, T. Miyake
{"title":"A wireless powered soft contact lens for bio-applications","authors":"T. Takamatsu, Lu Chen, T. Miyake","doi":"10.1299/JSMERMD.2018.1P1-J08","DOIUrl":"https://doi.org/10.1299/JSMERMD.2018.1P1-J08","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76144205","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 : 2018-02-08DOI: 10.36410/jcpr.2019.20.6.577
Takuya Igashira, G. Okada, N. Kawaguchi, T. Yanagida
{"title":"Optical and scintillation properties of Tb-doped apatite single crystals","authors":"Takuya Igashira, G. Okada, N. Kawaguchi, T. Yanagida","doi":"10.36410/jcpr.2019.20.6.577","DOIUrl":"https://doi.org/10.36410/jcpr.2019.20.6.577","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86888425","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}
Mayu Tsukamoto, J. Matsui, Shunsuke Yamamoto, T. Miyashita, M. Mitsuishi
{"title":"Two-dimensional Proton Conduction in Biomimetic Polymer Electrolytes","authors":"Mayu Tsukamoto, J. Matsui, Shunsuke Yamamoto, T. Miyashita, M. Mitsuishi","doi":"10.1149/ma2018-03/4/256","DOIUrl":"https://doi.org/10.1149/ma2018-03/4/256","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81004964","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 : 2018-02-08DOI: 10.1299/jsmemnm.2018.9.30am3pn33
N. Yokoi, T. Okamoto, Y. Aizu
{"title":"Fundamental Study on Control of Particles for Production of Random Laser Medium","authors":"N. Yokoi, T. Okamoto, Y. Aizu","doi":"10.1299/jsmemnm.2018.9.30am3pn33","DOIUrl":"https://doi.org/10.1299/jsmemnm.2018.9.30am3pn33","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"23 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78444218","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}
Ryosuke Mochii, M. Fujii, Y. Ishikawa, Y. Sugawara, Nobutake Nodera, Takao Matsumoto, Y. Uraoka
{"title":"Off Current Reduction of BG poly-Si TFT by PLAS Process","authors":"Ryosuke Mochii, M. Fujii, Y. Ishikawa, Y. Sugawara, Nobutake Nodera, Takao Matsumoto, Y. Uraoka","doi":"10.1002/SDTP.12450","DOIUrl":"https://doi.org/10.1002/SDTP.12450","url":null,"abstract":"","PeriodicalId":22504,"journal":{"name":"The Japan Society of Applied Physics","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81162633","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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