Angular dependence of exchange bias and coercivity in polycrystalline CoFe/MnIr bilayers

Dong Young Kim; Cheol Gi Kim; Chong Oh Kim; M. Tsunoda; M. Takahashi

doi:10.1016/j.jmmm.2006.01.220

Angular dependence of exchange bias and coercivity in polycrystalline CoFe/MnIr bilayers

Dong Young Kim
, Cheol Gi Kim
, Chong Oh Kim
, M. Tsunoda
, M. Takahashi

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

We have investigated the angular dependence of exchange bias (H_ex) and coercivity (H_c) in polycrystalline CoFe (100 nm)/MnIr(x) bilayers with x=0, 2, 4, 10 and 20 nm. The angular dependence of H_ex and H_c show the abrupt kinks at critical angle (θ_c) in the samples of H_c>H_ex. The profiles of angular dependent H_ex is changed at critical antiferromagnetic layer thickness ( t_AF^c ) and shows inverse proportional behavior with field angle from 90°-θ_c to 90°+θ_c. These complex angular dependence of H_ex and H_c with antiferromagnetic layer thickness can be well explained by using the Stoner-Wohlfarth (S-W) model.

Original language	English
Pages (from-to)	e56-e58
Journal	Journal of Magnetism and Magnetic Materials
Volume	304
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2006.01.220
State	Published - Sep 2006

Bibliographical note

Funding Information:
This work was supported by the KOSEF through ReCAMM in Chungnam National University.

Keywords

Coercivity
Exchange bias
S-W model
Unidirectional anisotropy

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10.1016/j.jmmm.2006.01.220

Cite this

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title = "Angular dependence of exchange bias and coercivity in polycrystalline CoFe/MnIr bilayers",

abstract = "We have investigated the angular dependence of exchange bias (Hex) and coercivity (Hc) in polycrystalline CoFe (100 nm)/MnIr(x) bilayers with x=0, 2, 4, 10 and 20 nm. The angular dependence of Hex and Hc show the abrupt kinks at critical angle (θc) in the samples of Hc>Hex. The profiles of angular dependent Hex is changed at critical antiferromagnetic layer thickness ( tAFc ) and shows inverse proportional behavior with field angle from 90°-θc to 90°+θc. These complex angular dependence of Hex and Hc with antiferromagnetic layer thickness can be well explained by using the Stoner-Wohlfarth (S-W) model.",

keywords = "Coercivity, Exchange bias, S-W model, Unidirectional anisotropy",

author = "Kim, \{Dong Young\} and Kim, \{Cheol Gi\} and Kim, \{Chong Oh\} and M. Tsunoda and M. Takahashi",

note = "Funding Information: This work was supported by the KOSEF through ReCAMM in Chungnam National University.",

year = "2006",

month = sep,

doi = "10.1016/j.jmmm.2006.01.220",

language = "English",

volume = "304",

pages = "e56--e58",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Angular dependence of exchange bias and coercivity in polycrystalline CoFe/MnIr bilayers

AU - Kim, Dong Young

AU - Kim, Cheol Gi

AU - Kim, Chong Oh

AU - Tsunoda, M.

AU - Takahashi, M.

N1 - Funding Information: This work was supported by the KOSEF through ReCAMM in Chungnam National University.

PY - 2006/9

Y1 - 2006/9

N2 - We have investigated the angular dependence of exchange bias (Hex) and coercivity (Hc) in polycrystalline CoFe (100 nm)/MnIr(x) bilayers with x=0, 2, 4, 10 and 20 nm. The angular dependence of Hex and Hc show the abrupt kinks at critical angle (θc) in the samples of Hc>Hex. The profiles of angular dependent Hex is changed at critical antiferromagnetic layer thickness ( tAFc ) and shows inverse proportional behavior with field angle from 90°-θc to 90°+θc. These complex angular dependence of Hex and Hc with antiferromagnetic layer thickness can be well explained by using the Stoner-Wohlfarth (S-W) model.

AB - We have investigated the angular dependence of exchange bias (Hex) and coercivity (Hc) in polycrystalline CoFe (100 nm)/MnIr(x) bilayers with x=0, 2, 4, 10 and 20 nm. The angular dependence of Hex and Hc show the abrupt kinks at critical angle (θc) in the samples of Hc>Hex. The profiles of angular dependent Hex is changed at critical antiferromagnetic layer thickness ( tAFc ) and shows inverse proportional behavior with field angle from 90°-θc to 90°+θc. These complex angular dependence of Hex and Hc with antiferromagnetic layer thickness can be well explained by using the Stoner-Wohlfarth (S-W) model.

KW - Coercivity

KW - Exchange bias

KW - S-W model

KW - Unidirectional anisotropy

UR - https://www.scopus.com/pages/publications/33646888433

U2 - 10.1016/j.jmmm.2006.01.220

DO - 10.1016/j.jmmm.2006.01.220

M3 - Article

AN - SCOPUS:33646888433

SN - 0304-8853

VL - 304

SP - e56-e58

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1

ER -

Angular dependence of exchange bias and coercivity in polycrystalline CoFe/MnIr bilayers

Abstract

Bibliographical note

Keywords

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