Positive to negative zero-field cooled exchange bias in La(0.5)Sr(0.5)Mn(0.8)Co(0.2)O(3) ceramics

Exchange bias effect obtained after zero-field cooling from unmagnetized state usually exhibits a shift of hysteresis loop negative to the direction of the initial magnetic field, known as negative zero-field cooled exchange bias. Here, positive zero-field cooled exchange bias is reported in La(0.5)...

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Detalles Bibliográficos
Autores principales: Shang, Cui, Guo, Shaopu, Wang, Ruilong, Sun, Zhigang, Xiao, Haibo, Xu, Lingfang, Yang, Changping, Xia, Zhengcai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4863367/
https://www.ncbi.nlm.nih.gov/pubmed/27168382
http://dx.doi.org/10.1038/srep25703
Descripción
Sumario:Exchange bias effect obtained after zero-field cooling from unmagnetized state usually exhibits a shift of hysteresis loop negative to the direction of the initial magnetic field, known as negative zero-field cooled exchange bias. Here, positive zero-field cooled exchange bias is reported in La(0.5)Sr(0.5)Mn(0.8)Co(0.2)O(3) ceramics. In addition, a transition from positive to negative exchange bias has been observed with increasing initial magnetization field and measurement temperature. Based on a simple spin bidomain model with variable interface, two type of interfacial spin configuration formed during the initial magnetization process are proposed to interpret the observed phenomenon.

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