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Title | Exchange anisotropy: phenomenological description and a simple model |
Authors |
Shamardin, A.V.
|
ORCID | |
Keywords |
anisotropy анізотропія анизотропия phenomenological description феноменологічний опис феноменологическое описание |
Type | Conference Papers |
Date of Issue | 2015 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/40676 |
Publisher | Sumy State University |
License | |
Citation | Shamardin, A.V. Exchange anisotropy: phenomenological description and a simple model [Текст] / A.V. Shamardin; EL adviser A.M Diadechko // Соціально-гуманітарні аспекти розвитку сучасного суспільства : матеріали Всеукраїнської наукової конференції викладачів, аспірантів, співробітників та студентів, м. Суми, 23-24 квітня 2015 року. - Суми : СумДУ, 2015. - С. 318-319. |
Abstract |
One of the key components in GMR materials , magnetic tunnel junctions or other electromagnetic devices is often an antiferromagnetic (AF) layer which is exchangecoupled to a ferromagnetic (F) layer. The function of the AF layer is to pin the magnetization direction of the adjacent F layer to a certain direction. The most prominent manifestation of the F/AF exchange interaction is a shift of the hysteresis loop of the F layer along the field axis, as if an additional fixed external field is applied to the F layer. This effective magnetic field is called the exchange bias field, H. The direction of this effective field is called the exchange bias direction. In contrast to the ferromagnetocrystalline anisotropy of a homogeneous magnet, which is characterized by easy and hard axes, exchange anisotropy is characterized by a single easy direction. It is called uniaxial anisotropy. |
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