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Role of the stability of charge ordering in exchange bias effect in doped manganites.


ABSTRACT: 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.

SUBMITTER: Dasgupta P 

PROVIDER: S-EPMC5468231 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Role of the stability of charge ordering in exchange bias effect in doped manganites.

Dasgupta Papri P   Das Kalipada K   Pakhira Santanu S   Mazumdar Chandan C   Mukherjee S S   Mukherjee S S   Poddar A A  

Scientific reports 20170612 1


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 Sm<sub>1-x</sub> Ca <sub>x</sub> MnO<sub>3</sub> (x = 0.5, 0.55, 0.6, 0.65, 0.7) compounds shows that Sm<sub>0.4</sub>Ca<sub>0.6</sub>MnO<sub>3</sub>, which is the most robust charge ordered material studied here, shows significantly large exchange bias field (H<sub>E</sub>) as compared to the other compounds. Ou  ...[more]

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