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

Journal Article


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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.

Authors


  •   Debnath, J C. (external author)
  •   Kim, Jung Ho
  •   Heo, Yoon-Uk (external author)
  •   Strydom, Andre M. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2013

Citation


  • Debnath, J. C., Kim, J. H., Heo, Y., Strydom, A. M. & Dou, S. X. (2013). Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film. Journal of Applied Physics, 113 (6), 063508-1-063508-6.

Scopus Eid


  • 2-s2.0-84874297719

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1588&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/588

Has Global Citation Frequency


Start Page


  • 063508-1

End Page


  • 063508-6

Volume


  • 113

Issue


  • 6

Place Of Publication


  • United States

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.

Authors


  •   Debnath, J C. (external author)
  •   Kim, Jung Ho
  •   Heo, Yoon-Uk (external author)
  •   Strydom, Andre M. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2013

Citation


  • Debnath, J. C., Kim, J. H., Heo, Y., Strydom, A. M. & Dou, S. X. (2013). Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film. Journal of Applied Physics, 113 (6), 063508-1-063508-6.

Scopus Eid


  • 2-s2.0-84874297719

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1588&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/588

Has Global Citation Frequency


Start Page


  • 063508-1

End Page


  • 063508-6

Volume


  • 113

Issue


  • 6

Place Of Publication


  • United States