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Current Driven Magnetic Damping in Dipolar-Coupled Spin System

Magnetic damping of the spin, the decay rate from the initial spin state to the final state, can be controlled by the spin transfer torque. Such an active control of damping has given birth to novel phenomena like the current-driven magnetization reversal and the steady spin precession. The spintron...

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Autores principales: Lee, Sung Chul, Pi, Ung Hwan, Kim, Keewon, Kim, Kwang Seok, Shin, Jaikwang, -In Chung, U
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404414/
https://www.ncbi.nlm.nih.gov/pubmed/22833784
http://dx.doi.org/10.1038/srep00531
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author Lee, Sung Chul
Pi, Ung Hwan
Kim, Keewon
Kim, Kwang Seok
Shin, Jaikwang
-In Chung, U
author_facet Lee, Sung Chul
Pi, Ung Hwan
Kim, Keewon
Kim, Kwang Seok
Shin, Jaikwang
-In Chung, U
author_sort Lee, Sung Chul
collection PubMed
description Magnetic damping of the spin, the decay rate from the initial spin state to the final state, can be controlled by the spin transfer torque. Such an active control of damping has given birth to novel phenomena like the current-driven magnetization reversal and the steady spin precession. The spintronic devices based on such phenomena generally consist of two separate spin layers, i.e., free and pinned layers. Here we report that the dipolar coupling between the two layers, which has been considered to give only marginal effects on the current driven spin dynamics, actually has a serious impact on it. The damping of the coupled spin system was greatly enhanced at a specific field, which could not be understood if the spin dynamics in each layer was considered separately. Our results give a way to control the magnetic damping of the dipolar coupled spin system through the external magnetic field.
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spelling pubmed-34044142012-07-25 Current Driven Magnetic Damping in Dipolar-Coupled Spin System Lee, Sung Chul Pi, Ung Hwan Kim, Keewon Kim, Kwang Seok Shin, Jaikwang -In Chung, U Sci Rep Article Magnetic damping of the spin, the decay rate from the initial spin state to the final state, can be controlled by the spin transfer torque. Such an active control of damping has given birth to novel phenomena like the current-driven magnetization reversal and the steady spin precession. The spintronic devices based on such phenomena generally consist of two separate spin layers, i.e., free and pinned layers. Here we report that the dipolar coupling between the two layers, which has been considered to give only marginal effects on the current driven spin dynamics, actually has a serious impact on it. The damping of the coupled spin system was greatly enhanced at a specific field, which could not be understood if the spin dynamics in each layer was considered separately. Our results give a way to control the magnetic damping of the dipolar coupled spin system through the external magnetic field. Nature Publishing Group 2012-07-25 /pmc/articles/PMC3404414/ /pubmed/22833784 http://dx.doi.org/10.1038/srep00531 Text en Copyright © 2012, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Lee, Sung Chul
Pi, Ung Hwan
Kim, Keewon
Kim, Kwang Seok
Shin, Jaikwang
-In Chung, U
Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title_full Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title_fullStr Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title_full_unstemmed Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title_short Current Driven Magnetic Damping in Dipolar-Coupled Spin System
title_sort current driven magnetic damping in dipolar-coupled spin system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404414/
https://www.ncbi.nlm.nih.gov/pubmed/22833784
http://dx.doi.org/10.1038/srep00531
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