Exchange-interaction by the induced growth of the soft phase on the extreme hard phase

Exchange-interaction by the induced growth of the soft phase on the extreme hard phase

The significant change is reported in interparticle interaction for nanocomposites of ε-Fe2O3 and FeCo as the grain size of the soft phase (FeCo) increases upon annealing. It undergoes a transition from the dipolar interaction dominant regime into the exchange-interaction dominant regime, starting f...

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Main Authors: Hoju Kang, Satoshi Sugimoto
Format: Article
Language:English
Published: AIP Publishing LLC 2018-10-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5042626
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spelling doaj-92ec18f011cd4872a0eefd97dfaa95af2020-11-24T21:46:01ZengAIP Publishing LLCAIP Advances2158-32262018-10-01810105036105036-610.1063/1.5042626128810ADVExchange-interaction by the induced growth of the soft phase on the extreme hard phaseHoju Kang0Satoshi Sugimoto1Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, JapanDepartment of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, JapanThe significant change is reported in interparticle interaction for nanocomposites of ε-Fe2O3 and FeCo as the grain size of the soft phase (FeCo) increases upon annealing. It undergoes a transition from the dipolar interaction dominant regime into the exchange-interaction dominant regime, starting from the crystalline soft phase size of 9.6 nm, which is coincident with the theoretical critical dimension. The effective anisotropy increases exponentially as the ordering dimension of the soft phase increases with the ratio between hard and soft phases stays constant, causing a delay in the demagnetization process. The emerged exchange-interaction is understood by the induced growth of the soft phase on the extreme hard phase.http://dx.doi.org/10.1063/1.5042626
collection DOAJ
language English
format Article
sources DOAJ
author Hoju Kang
Satoshi Sugimoto
spellingShingle Hoju Kang
Satoshi Sugimoto
Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
AIP Advances
author_facet Hoju Kang
Satoshi Sugimoto
author_sort Hoju Kang
title Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
title_short Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
title_full Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
title_fullStr Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
title_full_unstemmed Exchange-interaction by the induced growth of the soft phase on the extreme hard phase
title_sort exchange-interaction by the induced growth of the soft phase on the extreme hard phase
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2018-10-01
description The significant change is reported in interparticle interaction for nanocomposites of ε-Fe2O3 and FeCo as the grain size of the soft phase (FeCo) increases upon annealing. It undergoes a transition from the dipolar interaction dominant regime into the exchange-interaction dominant regime, starting from the crystalline soft phase size of 9.6 nm, which is coincident with the theoretical critical dimension. The effective anisotropy increases exponentially as the ordering dimension of the soft phase increases with the ratio between hard and soft phases stays constant, causing a delay in the demagnetization process. The emerged exchange-interaction is understood by the induced growth of the soft phase on the extreme hard phase.
url http://dx.doi.org/10.1063/1.5042626
work_keys_str_mv AT hojukang exchangeinteractionbytheinducedgrowthofthesoftphaseontheextremehardphase
AT satoshisugimoto exchangeinteractionbytheinducedgrowthofthesoftphaseontheextremehardphase
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