Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers

X. Li; K.-W. Lin; W.-C. Yeh; R.D. Desautels; J. van Lierop; P.W.T. Pong

doi:10.1016/j.physleta.2016.11.033

期刊文章

Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers

X. Li, K.-W. Lin, W.-C. Yeh, R.D. Desautels, J. van Lierop 和 P.W.T. Pong

Physics Letters, Section A: General, Atomic and Solid State Physics, 卷.381(5), 頁碼.524-528

2017

DOI: https://doi.org/10.1016/j.physleta.2016.11.033

Web of Science ID: WOS:000392776900021

摘要

Exchange bias

Magnetic thin film

Nanomagnetics

Trilayer

Cobalt compounds

Frequency modulation

Hematite

Magnetic thin films

Magnetism

Nanomagnetics

Bi-layer

Chemical compositions

Exchange bias

Interfacial interaction

Temperature dependent

Tri layers

Magnetic materials

While the exchange bias in ferromagnetic/antiferromagnetic (FM/AF) bilayer and FM1/AF/FM2 trilayer configurations has been widely investigated, the role of an AF2 layer in FM/AF1/AF2 trilayer configurations is still not well understood. In this work, the magnetic properties of NiFe/CoO, NiFe/α-Fe2O3 bilayers, and NiFe/CoO/α-Fe2O3 trilayer were studied comparatively. The microstructure and chemical composition were characterized. Temperature dependent magnetometry reveals increased irreversibility temperature in NiFe/CoO/α-Fe2O3 trilayer compared with NiFe/CoO bilayer. The magnetic hysteresis loops show that the exchange bias (Hex) and coercivity (Hc) depend strongly on the anisotropy of AF layer (CoO, α-Fe2O3 and CoO/α-Fe2O3). Our work shows that the AF1/AF2 interfacial interactions can be used effectively for tuning the exchange bias in FM/AF1/AF2 trilayers. © 2016 Elsevier B.V.

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題名: Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers
創作者：: X. Li - University of Hong Kong
K.-W. Lin - National Chung Hsing University
W.-C. Yeh - National Chung Hsing University
R.D. Desautels - University of Manitoba
J. van Lierop - University of Manitoba
P.W.T. Pong - University of Hong Kong
出版者: Elsevier B.V.; AMSTERDAM
總頁數: 5
補助款備註: MOST of Taiwan NSERC CFI of Canada Seed Funding Program for Basic Research University of Hong Kong: ITS-104/13, ITS-214/14 University Grants Committee of HK: AoE/P-04/08
This work was supported by the MOST of Taiwan, NSERC and CFI of Canada, Seed Funding Program for Basic Research, Seed Funding Program for Applied Research and Small Project Funding Program from the University of Hong Kong, ITF Tier 3 funding (ITS-104/13, ITS-214/14), and University Grants Committee of HK (AoE/P-04/08).
學術資源類型: 期刊文章
出版日期: 2017
出版資訊: Physics Letters, Section A: General, Atomic and Solid State Physics, 卷.381(5), 頁碼.524-528
語言: 英語

Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers

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