Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films

Yali Xie; Qingfeng Zhan; Yiwei Liu; Guohong Dai; Huali Yang; Zhenghu Zuo; Bin Chen; Baomin Wang; Yao Zhang; Xin Rong; Run Wei Li

doi:10.1063/1.4901911

Electric-field control of magnetic anisotropy in Fe₈₁Ga₁₉/BaTiO₃ heterostructure films

Yali Xie^*
, Qingfeng Zhan
, Yiwei Liu
, Guohong Dai
, Huali Yang
, Zhenghu Zuo
, Bin Chen
, Baomin Wang
, Yao Zhang
, Xin Rong
, Run Wei Li

^*Corresponding author for this work

CAS - Ningbo Institute of Material Technology and Engineering

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

17 Scopus citations

Abstract

We investigate the control of magnetism with an electric field in Fe₈₁Ga₁₉(FeGa)/BaTiO₃(BTO) heterostructure films. The as-prepared FeGa/BTO samples present a uniaxial magnetic anisotropy, which is ascribed to be induced by the spontaneous ferroelectric polarization of the BTO substrates. With the electric field applied on the BTO substrates increasing from 0 to 6 kV/cm, the coercivity of FeGa films measured along the BTO[110] direction increases from 28 to 41 Oe, while the squareness of the hysteresis loop decreases from 0.99 to 0.31, which indicates that the easy and hard axes of FeGa films are swapped. The ferroelectric domains of BTO substrates and the magnetic domains of FeGa films exhibit the same dependence on the applied electric fields, manifesting the strong magnetoelectric coupling between the ferroelectricity of BTO substrates and the magnetism of FeGa films.

Original language	English
Article number	117113
Journal	AIP Advances
Volume	4
Issue number	11
DOIs	https://doi.org/10.1063/1.4901911
State	Published - 1 Nov 2014
Externally published	Yes

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title = "Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films",

abstract = "We investigate the control of magnetism with an electric field in Fe81Ga19(FeGa)/BaTiO3(BTO) heterostructure films. The as-prepared FeGa/BTO samples present a uniaxial magnetic anisotropy, which is ascribed to be induced by the spontaneous ferroelectric polarization of the BTO substrates. With the electric field applied on the BTO substrates increasing from 0 to 6 kV/cm, the coercivity of FeGa films measured along the BTO[110] direction increases from 28 to 41 Oe, while the squareness of the hysteresis loop decreases from 0.99 to 0.31, which indicates that the easy and hard axes of FeGa films are swapped. The ferroelectric domains of BTO substrates and the magnetic domains of FeGa films exhibit the same dependence on the applied electric fields, manifesting the strong magnetoelectric coupling between the ferroelectricity of BTO substrates and the magnetism of FeGa films.",

author = "Yali Xie and Qingfeng Zhan and Yiwei Liu and Guohong Dai and Huali Yang and Zhenghu Zuo and Bin Chen and Baomin Wang and Yao Zhang and Xin Rong and Li, \{Run Wei\}",

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doi = "10.1063/1.4901911",

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volume = "4",

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TY - JOUR

T1 - Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films

AU - Xie, Yali

AU - Zhan, Qingfeng

AU - Liu, Yiwei

AU - Dai, Guohong

AU - Yang, Huali

AU - Zuo, Zhenghu

AU - Chen, Bin

AU - Wang, Baomin

AU - Zhang, Yao

AU - Rong, Xin

AU - Li, Run Wei

PY - 2014/11/1

Y1 - 2014/11/1

N2 - We investigate the control of magnetism with an electric field in Fe81Ga19(FeGa)/BaTiO3(BTO) heterostructure films. The as-prepared FeGa/BTO samples present a uniaxial magnetic anisotropy, which is ascribed to be induced by the spontaneous ferroelectric polarization of the BTO substrates. With the electric field applied on the BTO substrates increasing from 0 to 6 kV/cm, the coercivity of FeGa films measured along the BTO[110] direction increases from 28 to 41 Oe, while the squareness of the hysteresis loop decreases from 0.99 to 0.31, which indicates that the easy and hard axes of FeGa films are swapped. The ferroelectric domains of BTO substrates and the magnetic domains of FeGa films exhibit the same dependence on the applied electric fields, manifesting the strong magnetoelectric coupling between the ferroelectricity of BTO substrates and the magnetism of FeGa films.

AB - We investigate the control of magnetism with an electric field in Fe81Ga19(FeGa)/BaTiO3(BTO) heterostructure films. The as-prepared FeGa/BTO samples present a uniaxial magnetic anisotropy, which is ascribed to be induced by the spontaneous ferroelectric polarization of the BTO substrates. With the electric field applied on the BTO substrates increasing from 0 to 6 kV/cm, the coercivity of FeGa films measured along the BTO[110] direction increases from 28 to 41 Oe, while the squareness of the hysteresis loop decreases from 0.99 to 0.31, which indicates that the easy and hard axes of FeGa films are swapped. The ferroelectric domains of BTO substrates and the magnetic domains of FeGa films exhibit the same dependence on the applied electric fields, manifesting the strong magnetoelectric coupling between the ferroelectricity of BTO substrates and the magnetism of FeGa films.

UR - https://www.scopus.com/pages/publications/84910116662

U2 - 10.1063/1.4901911

DO - 10.1063/1.4901911

M3 - 文章

AN - SCOPUS:84910116662

SN - 2158-3226

VL - 4

JO - AIP Advances

JF - AIP Advances

IS - 11

M1 - 117113

ER -

Electric-field control of magnetic anisotropy in Fe₈₁Ga₁₉/BaTiO₃ heterostructure films

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