Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

J. C. Debnath; J. H. Kim; Y. Heo; A. M. Strydom; S. X. Dou

doi:10.1063/1.4790876

Correlation between structural parameters and the magnetocaloric effect in epitaxial La_0.8Ca_0.2MnO₃/LaAlO₃ thin film

J. C. Debnath, J. H. Kim, Y. Heo, A. M. Strydom, S. X. Dou

Physics

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

An epitaxial La_0.8Ca_0.2MnO₃/LaAlO ₃ (LCMO/LAO) thin film was fabricated using the pulsed laser deposition technique to evaluate the correlation between the crystal structure and the magnetocaloric effect. In our study, the LCMO film was 200 nm in thickness and appeared to have a strong out-of plane texture. We found that each column in the LCMO thin film layer is a domain which has a different ordering direction. These microscopic feature results in anisotropic properties of magnetization, entropy, and relative cooling power. The film exhibited a paramagnetic-to-ferromagnetic second order phase transition at 249 K. The lack of any hysteresis loss also confirmed that the material is intrinsically reversible. In addition, the large magnetization of the thin film results in an entropy change larger than those of all other perovskite type materials. Consequently, the relative cooling power is significantly enhanced.

Original language	English
Article number	063508
Journal	Journal of Applied Physics
Volume	113
Issue number	6
DOIs	https://doi.org/10.1063/1.4790876
Publication status	Published - 14 Feb 2013

ASJC Scopus subject areas

General Physics and Astronomy

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1063/1.4790876

Cite this

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title = "Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film",

abstract = "An epitaxial La0.8Ca0.2MnO3/LaAlO 3 (LCMO/LAO) thin film was fabricated using the pulsed laser deposition technique to evaluate the correlation between the crystal structure and the magnetocaloric effect. In our study, the LCMO film was 200 nm in thickness and appeared to have a strong out-of plane texture. We found that each column in the LCMO thin film layer is a domain which has a different ordering direction. These microscopic feature results in anisotropic properties of magnetization, entropy, and relative cooling power. The film exhibited a paramagnetic-to-ferromagnetic second order phase transition at 249 K. The lack of any hysteresis loss also confirmed that the material is intrinsically reversible. In addition, the large magnetization of the thin film results in an entropy change larger than those of all other perovskite type materials. Consequently, the relative cooling power is significantly enhanced.",

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AU - Strydom, A. M.

AU - Dou, S. X.

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