Slow Thermodynamics in the Phase Separated State of the Bilayered Manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7

Bilayered perovskite (La0.4Pr0.6)1.2Sr1.8Mn2O7 exhibits a field-induced paramagnetic-insulator to ferromagnetic- metal transition, and a phase-separated state is realized after the field is switched off. In order to clarify the thermodynamic properties of the phase-separated state which is a common...

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Bibliographic Details
Published in:Physics procedia 2015, Vol.75, p.468-474
Main Authors: Taniguchi, Haruka, Nakamura, Yuma, Konno, Takahisa, Matsukawa, Michiaki, Suryanarayanan, Ramanathaan
Format: Article
Language:English
Subjects:
frustration
manganite
phase separation
thermodynamics
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Summary:Bilayered perovskite (La0.4Pr0.6)1.2Sr1.8Mn2O7 exhibits a field-induced paramagnetic-insulator to ferromagnetic- metal transition, and a phase-separated state is realized after the field is switched off. In order to clarify the thermodynamic properties of the phase-separated state which is a common feature in many mangan- ites, we performed specific heat measurement with field along the magnetization easy axis. We have revealed that the remanent specifc heat might exhibit a stretched exponential decay and the relaxation time is remarkably long. These results indicate the importance of magnetic frustration originating from the competition between double-exchange interaction and superexchange interaction.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.12.058