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Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions
Recent progress in magnetic tunnel junctions (MTJs) with a perpendicular easy axis consisting of CoFeB and MgO stacking structures has shown that magnetization dynamics are induced due to voltage-controlled magnetic anisotropy (VCMA), which will potentially lead to future low-power-consumption infor...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5314320/ https://www.ncbi.nlm.nih.gov/pubmed/28209976 http://dx.doi.org/10.1038/srep42511 |
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author | Miura, Katsuya Yabuuchi, Shin Yamada, Masaki Ichimura, Masahiko Rana, Bivas Ogawa, Susumu Takahashi, Hiromasa Fukuma, Yasuhiro Otani, Yoshichika |
author_facet | Miura, Katsuya Yabuuchi, Shin Yamada, Masaki Ichimura, Masahiko Rana, Bivas Ogawa, Susumu Takahashi, Hiromasa Fukuma, Yasuhiro Otani, Yoshichika |
author_sort | Miura, Katsuya |
collection | PubMed |
description | Recent progress in magnetic tunnel junctions (MTJs) with a perpendicular easy axis consisting of CoFeB and MgO stacking structures has shown that magnetization dynamics are induced due to voltage-controlled magnetic anisotropy (VCMA), which will potentially lead to future low-power-consumption information technology. For manipulating magnetizations in MTJs by applying voltage, it is necessary to understand the coupled magnetization motion of two magnetic (recording and reference) layers. In this report, we focus on the magnetization motion of two magnetic layers in MTJs consisting of top layers with an in-plane easy axis and bottom layers with a perpendicular easy axis, both having perpendicular magnetic anisotropy. According to rectified voltage (V(rec)) measurements, the amplitude of the magnetization motion depends on the initial angles of the magnetizations with respect to the VCMA direction. Our numerical simulations involving the micromagnetic method based on the Landau-Lifshitz-Gilbert equation of motion indicate that the magnetization motion in both layers is induced by a combination of VCMA and transferred angular momentum, even though the magnetic easy axes of the two layers are different. Our study will lead to the development of voltage-controlled MTJs having perpendicular magnetic anisotropy by controlling the initial angle between magnetizations and VCMA directions. |
format | Online Article Text |
id | pubmed-5314320 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-53143202017-02-23 Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions Miura, Katsuya Yabuuchi, Shin Yamada, Masaki Ichimura, Masahiko Rana, Bivas Ogawa, Susumu Takahashi, Hiromasa Fukuma, Yasuhiro Otani, Yoshichika Sci Rep Article Recent progress in magnetic tunnel junctions (MTJs) with a perpendicular easy axis consisting of CoFeB and MgO stacking structures has shown that magnetization dynamics are induced due to voltage-controlled magnetic anisotropy (VCMA), which will potentially lead to future low-power-consumption information technology. For manipulating magnetizations in MTJs by applying voltage, it is necessary to understand the coupled magnetization motion of two magnetic (recording and reference) layers. In this report, we focus on the magnetization motion of two magnetic layers in MTJs consisting of top layers with an in-plane easy axis and bottom layers with a perpendicular easy axis, both having perpendicular magnetic anisotropy. According to rectified voltage (V(rec)) measurements, the amplitude of the magnetization motion depends on the initial angles of the magnetizations with respect to the VCMA direction. Our numerical simulations involving the micromagnetic method based on the Landau-Lifshitz-Gilbert equation of motion indicate that the magnetization motion in both layers is induced by a combination of VCMA and transferred angular momentum, even though the magnetic easy axes of the two layers are different. Our study will lead to the development of voltage-controlled MTJs having perpendicular magnetic anisotropy by controlling the initial angle between magnetizations and VCMA directions. Nature Publishing Group 2017-02-17 /pmc/articles/PMC5314320/ /pubmed/28209976 http://dx.doi.org/10.1038/srep42511 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Miura, Katsuya Yabuuchi, Shin Yamada, Masaki Ichimura, Masahiko Rana, Bivas Ogawa, Susumu Takahashi, Hiromasa Fukuma, Yasuhiro Otani, Yoshichika Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title | Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title_full | Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title_fullStr | Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title_full_unstemmed | Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title_short | Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions |
title_sort | voltage-induced magnetization dynamics in cofeb/mgo/cofeb magnetic tunnel junctions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5314320/ https://www.ncbi.nlm.nih.gov/pubmed/28209976 http://dx.doi.org/10.1038/srep42511 |
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