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Core Reversal in Vertically Coupled Vortices: Simulation and Experimental Study 垂直耦合涡流中的核心逆转:模拟与实验研究
IF 2.1 4区 工程技术
IEEE Transactions on Nanotechnology Pub Date : 2024-06-28 DOI: 10.1109/TNANO.2024.3420249
Abbass Hamadeh;Abbas Koujok;Salvatore Perna;Davi R. Rodrigues;Alejandro Riveros;Vitaliy Lomakin;Giovanni Finocchio;Grégoire de Loubens;Olivier Klein;Philipp Pirro
{"title":"Core Reversal in Vertically Coupled Vortices: Simulation and Experimental Study","authors":"Abbass Hamadeh;Abbas Koujok;Salvatore Perna;Davi R. Rodrigues;Alejandro Riveros;Vitaliy Lomakin;Giovanni Finocchio;Grégoire de Loubens;Olivier Klein;Philipp Pirro","doi":"10.1109/TNANO.2024.3420249","DOIUrl":"10.1109/TNANO.2024.3420249","url":null,"abstract":"This study conducts a comprehensive investigation into the reversal mechanism of magnetic vortex cores in a nanopillar system composed of two coupled ferromagnetic dots under zero magnetic field conditions. The research employs a combination of experimental and simulation methods to gain a deeper understanding of the dynamics of magnetic vortex cores. The findings reveal that by applying a constant direct current, the orientation of the vortex cores can be manipulated, resulting in a switch in one of the dots at a specific current value. The micromagnetic simulations provide evidence that this switch is a consequence of a deformation in the vortex profile caused by the increasing velocity of the vortex cores resulting from the constant amplitude of the trajectory as frequency increases. These findings offer valuable new insights into the coupled dynamics of magnetic vortex cores and demonstrate the feasibility of manipulating their orientation using direct currents under zero magnetic field conditions. The results of this study have potential implications for the development of vortex-based non-volatile memory technologies.","PeriodicalId":449,"journal":{"name":"IEEE Transactions on Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Sensors Council 电气和电子工程师学会传感器理事会
IF 4.3 2区 综合性期刊
IEEE Sensors Journal Pub Date : 2024-06-28 DOI: 10.1109/JSEN.2024.3415455
{"title":"IEEE Sensors Council","authors":"","doi":"10.1109/JSEN.2024.3415455","DOIUrl":"https://doi.org/10.1109/JSEN.2024.3415455","url":null,"abstract":"","PeriodicalId":447,"journal":{"name":"IEEE Sensors Journal","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10577557","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141474847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
News from Japan 日本新闻
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568083
Yoshimichi Ohki
{"title":"News from Japan","authors":"Yoshimichi Ohki","doi":"10.1109/MEI.2024.10568083","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568083","url":null,"abstract":"As reported in this article in the preceding issue [1], many Japanese companies and universities are accelerating the development of power generation devices that use renewable energy sources. Continuing from [1], the research and development activities toward innovative solar cells being conducted by the Toshiba group are introduced in this article. At present, the most widely used solar cells for power generation use crystalline silicon. However, solar cells using silicon crystals need thick glass to prevent damage from hail and the like. Partly because of that, silicon solar cells are unbendable, thick, and heavy. This causes a shortage of adequate new places to install silicon solar cells, especially in densely populated cities. If flexible, thin, and light solar cells are developed at a reasonable price, we can use lots of places to generate electric power without adding much weight. Then, various surfaces such as curved roofs, walls, and windows of houses, buildings, and other objects with low load-bearing capacity, like cars and daily commodities, can be electric power generators. Even toys and clothes are usable.","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bulletin Board: Call for Editorial Board 公告栏:征集编辑委员会成员
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10566869
{"title":"Bulletin Board: Call for Editorial Board","authors":"","doi":"10.1109/MEI.2024.10566869","DOIUrl":"https://doi.org/10.1109/MEI.2024.10566869","url":null,"abstract":"If you are excited to work together in a team of experts and help shape the content of IEEE Electrical Insulation Magazine (EIM), you may want to apply for a position on the editorial board. The Dielectrics and Electrical Insulation Society (DEIS) is now looking for two new board members, starting January 1, 2025.","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10566869","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bulletin Board: Third Thematic School on Dielectrics 公告栏:第三届电介质专题学校
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10566872
{"title":"Bulletin Board: Third Thematic School on Dielectrics","authors":"","doi":"10.1109/MEI.2024.10566872","DOIUrl":"https://doi.org/10.1109/MEI.2024.10566872","url":null,"abstract":"","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10566872","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stories from China 来自中国的故事
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568084
Zepeng Lv
{"title":"Stories from China","authors":"Zepeng Lv","doi":"10.1109/MEI.2024.10568084","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568084","url":null,"abstract":"The vacuum breakdown issue severely hinders the performance of vacuum electrical devices, such as vacuum interrupters, X-ray sources, fusion reactors, and particle accelerators [1]–[3]. In general, vacuum breakdown is initiated by thermal instability at the cathode or anode due to the electron emission current, which heats the protrusion itself or transfers kinetic energy to the anode. Then, the initial vapor and ion population could be produced by the atom evaporation due to extreme heating, induced by the field electron emission current. Due to the evaporated atoms, the gap pressure increases and the mean free path of electrons may become less than the gap distance, where avalanche ionization will occur and cause the plasma discharge. Thus, the dynamics of electron emission and the electrode's properties will determine the dielectric strength and insulation performance of the gap.","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Electrical Insulation Magazine, a Publication of DEIS IEEE 电气绝缘杂志》,DEIS 的出版物
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568094
{"title":"IEEE Electrical Insulation Magazine, a Publication of DEIS","authors":"","doi":"10.1109/MEI.2024.10568094","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568094","url":null,"abstract":"","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Author's Guide for IEEE Electrical Insulation Magazine Technical Articles IEEE 电气绝缘杂志技术文章作者指南
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568099
{"title":"Author's Guide for IEEE Electrical Insulation Magazine Technical Articles","authors":"","doi":"10.1109/MEI.2024.10568099","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568099","url":null,"abstract":"","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From the Editor 编辑的话
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568086
{"title":"From the Editor","authors":"","doi":"10.1109/MEI.2024.10568086","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568086","url":null,"abstract":"In the first featured article in this issue, “Trends in Diagnostics and Monitoring of High-Voltage Insulation,” members of the IEEE DEIS Technical Committee on Diagnostics collaborated to highlight trends in the monitoring of high-voltage insulation. The article covers a wide range of applications from traditional power generation and transmission to emerging sectors such as transportation electrification.","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bulletin Board: 2024 Awards 公告栏:2024 年奖项
IF 2.6 4区 工程技术
IEEE Electrical Insulation Magazine Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568079
{"title":"Bulletin Board: 2024 Awards","authors":"","doi":"10.1109/MEI.2024.10568079","DOIUrl":"https://doi.org/10.1109/MEI.2024.10568079","url":null,"abstract":"The IEEE Dielectrics and Electrical Insulation Society (DEIS) has two DEIS-level technical awards that it bestows every two years. They are the highest-level IEEE technical awards in the dielectrics and electrical insulation field. DEIS President Davide Fabiani announced the winners of the 2024 awards in April. Prof. Yoshimichi Ohki is the 2024 Dakin Award recipient, and Prof. Yao Zhou is the 2024 Boggs Award recipient.","PeriodicalId":444,"journal":{"name":"IEEE Electrical Insulation Magazine","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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