文章基本信息

标题：Role of the stability of charge ordering in exchange bias effect in doped manganites
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作者：Papri Dasgupta ; Kalipada Das ; Santanu Pakhira 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2017
卷号：7
期号：1
DOI：10.1038/s41598-017-03451-z
语种：English
出版社：Springer Nature
摘要：In this work we have carried out an elaborate study on the magnetic properties and investigated the exchange bias phenomena of some charge-ordered (CO) manganites. The detailed study of Sm1-x Ca x MnO3 (x = 0.5, 0.55, 0.6, 0.65, 0.7) compounds shows that Sm0.4Ca0.6MnO3, which is the most robust charge ordered material studied here, shows significantly large exchange bias field (HE) as compared to the other compounds. Our experimental results and analysis indicate that TCO, which reflects the stability of the charge-ordered state, is one of the key parameters for the exchange bias effect. Similar behaviour is found in other rare-earth analogues, viz., La1-x Ca x MnO3 and Pr1-x Ca x MnO3 compounds as well. We also found that with increasing stability of CO states in Sm1-x Ca x MnO3 compounds, HE enhances due to increase in number and reduction in size of ferromagnetic clusters.