Charge disproportionation induced exchange bias in La0.5Ca0.5FeO3-δ

We observed an exchange bias effect in La0.5Ca0.5FeO3 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...

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Published inScience China. Physics, mechanics & astronomy Vol. 56; no. 11; pp. 2085 - 2089
Main Authors Liang, YaQiong, Zhang, XiangQun, Jin, JinLing, Zhan, QingFeng, Cheng, ZhaoHua
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2013
Springer Nature B.V
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ISSN1674-7348
1869-1927
DOI10.1007/s11433-013-5252-9

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Abstract We observed an exchange bias effect in La0.5Ca0.5FeO3 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 Ji 1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.
AbstractList We observed an exchange bias effect in La 0.5 Ca 0.5 FeO 3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from Fe 4+ ions to Fe 3+ and Fe 5+ ions below 175 K. The competition between the ferromagnetic interaction of Fe 3+ and Fe 5+ ions and the antiferromagnetic one of Fe 3+ and Fe 3+ 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.
We observed an exchange bias effect in La0.5Ca0.5FeO3-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 Ji≈−1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.
We observed an exchange bias effect in La0.5Ca0.5FeO3 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 Ji 1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.
Author LIANG YaQiong ZHANG XiangQun JIN JinLing ZHAN QingFeng CHENG ZhaoHua
AuthorAffiliation Logistic School, Beijing Wuzi University, Beijing 101149, China State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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CitedBy_id crossref_primary_10_1016_j_jmmm_2019_166104
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Keywords charge disproportionation
exchange bias
cluster glass
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Notes 11-5000/N
exchange bias; charge disproportionation; cluster glass
We observed an exchange bias effect in La0.5Ca0.5FeO3 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 Ji 1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.
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Snippet We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound. The exchange bias is associated with the charge disproportionation transition from...
We observed an exchange bias effect in La 0.5 Ca 0.5 FeO 3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition...
We observed an exchange bias effect in La0.5Ca0.5FeO3-δ perovskite compound. The exchange bias is associated with the charge disproportionation transition from...
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SubjectTerms Anisotropy
Antiferromagnetism
Astronomy
Bias
Charge exchange
Classical and Continuum Physics
Clusters
Disproportionation
Ferric ions
Ferromagnetism
Ions
Observations and Techniques
Perovskites
Physics
Physics and Astronomy
交换偏置场
充电
各向异性
歧化
玻璃系统
耦合常数
钙钛矿化合物
铁磁相互作用
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Title Charge disproportionation induced exchange bias in La0.5Ca0.5FeO3-δ
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