Charge disproportionation induced exchange bias in La0.5Ca 0.5FeO3-δ

Yaqiong Liang; Xiangqun Zhang; Jinling Jin; Qingfeng Zhan; Zhaohua Cheng

doi:10.1007/s11433-013-5252-9

Charge disproportionation induced exchange bias in La_0.5Ca _0.5FeO_3-δ

Yaqiong Liang
, Xiangqun Zhang
, Jinling Jin
, Qingfeng Zhan
, Zhaohua Cheng^*

^*Corresponding author for this work

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

1 Scopus citations

Abstract

We observed an exchange bias effect in La_0.5Ca _0.5FeO_3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from Fe⁴⁺ ions to Fe³⁺ and Fe⁵⁺ ions below 175 K. The competition between the ferromagnetic interaction of Fe³⁺ and Fe⁵⁺ ions and the antiferromagnetic one of Fe³⁺ and Fe³⁺ ions results in a unidirectional anisotropy in the cluster-glass system. An antiferromagnetically interfacial exchange coupling constant J _i≈-1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.

Original language	English
Pages (from-to)	2085-2089
Number of pages	5
Journal	Science China: Physics, Mechanics and Astronomy
Volume	56
Issue number	11
DOIs	https://doi.org/10.1007/s11433-013-5252-9
State	Published - Nov 2013
Externally published	Yes

Keywords

charge disproportionation
cluster glass
exchange bias

Access to Document

10.1007/s11433-013-5252-9

Cite this

@article{1174f3a48fd141e28ad03297349afc61,

title = "Charge disproportionation induced exchange bias in La0.5Ca 0.5FeO3-δ",

abstract = "We observed an exchange bias effect in La0.5Ca 0.5FeO3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from Fe4+ ions to Fe3+ and Fe5+ ions below 175 K. The competition between the ferromagnetic interaction of Fe3+ and Fe5+ ions and the antiferromagnetic one of Fe3+ and Fe3+ ions results in a unidirectional anisotropy in the cluster-glass system. An antiferromagnetically interfacial exchange coupling constant J i≈-1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.",

keywords = "charge disproportionation, cluster glass, exchange bias",

author = "Yaqiong Liang and Xiangqun Zhang and Jinling Jin and Qingfeng Zhan and Zhaohua Cheng",

year = "2013",

month = nov,

doi = "10.1007/s11433-013-5252-9",

language = "英语",

volume = "56",

pages = "2085--2089",

journal = "Science China: Physics, Mechanics and Astronomy",

issn = "1674-7348",

publisher = "Science China Press ",

number = "11",

}

TY - JOUR

T1 - Charge disproportionation induced exchange bias in La0.5Ca 0.5FeO3-δ

AU - Liang, Yaqiong

AU - Zhang, Xiangqun

AU - Jin, Jinling

AU - Zhan, Qingfeng

AU - Cheng, Zhaohua

PY - 2013/11

Y1 - 2013/11

N2 - We observed an exchange bias effect in La0.5Ca 0.5FeO3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from Fe4+ ions to Fe3+ and Fe5+ ions below 175 K. The competition between the ferromagnetic interaction of Fe3+ and Fe5+ ions and the antiferromagnetic one of Fe3+ and Fe3+ ions results in a unidirectional anisotropy in the cluster-glass system. An antiferromagnetically interfacial exchange coupling constant J i≈-1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.

AB - We observed an exchange bias effect in La0.5Ca 0.5FeO3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from Fe4+ ions to Fe3+ and Fe5+ ions below 175 K. The competition between the ferromagnetic interaction of Fe3+ and Fe5+ ions and the antiferromagnetic one of Fe3+ and Fe3+ ions results in a unidirectional anisotropy in the cluster-glass system. An antiferromagnetically interfacial exchange coupling constant J i≈-1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.

KW - charge disproportionation

KW - cluster glass

KW - exchange bias

UR - https://www.scopus.com/pages/publications/84888136169

U2 - 10.1007/s11433-013-5252-9

DO - 10.1007/s11433-013-5252-9

M3 - 文章

AN - SCOPUS:84888136169

SN - 1674-7348

VL - 56

SP - 2085

EP - 2089

JO - Science China: Physics, Mechanics and Astronomy

JF - Science China: Physics, Mechanics and Astronomy

IS - 11

ER -

Charge disproportionation induced exchange bias in La_0.5Ca _0.5FeO_3-δ

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this