Magnetocaloric Effect of La0.62Ca0.29K0.09MnO3 Epitaxial Film Prepared by Pulsed Laser Deposition

doi:10.7503/cjcu20130241

Abstract

Abstract:

La_0.62Ca_0.29K_0.09MnO₃(LCKMO) film was epitaxially grown on the (001) SrTiO₃(STO) single crystal substrate by pulsed laser deposition and a smooth and dense film was obtained by controlling the substrate temperature. The structure was characterized by 2D X-ray area detector and high resolution transmission electron microscopy, and the results indicate a high quality oriented growth of the film with the relationship of {001}LCKMO||{001}STO. At the magnetic field of 5 T, the maximum magnetic entropy change and relative cooling power of the film is 3.45 J/(kg·K) and 379.5 J/kg, respectively. A notable case is that the full width at half maximum of |ΔS_M| is 110 K, which is desirable for the Ericsson cycle, the excellent magneto caloric effect of the LCKMO film reveals its great applicative potentialities as magnetic cooling refrigerant.

Key words: Magnetocaloric effect, Epitaxial film, Pulsed laser deposition, Manganite

CLC Number:

O611.3

TrendMD:

WU Xiao-Feng, HUANG Ke-Ke, HOU Chang-Min, GE Lei, CHU Xue-Feng, WANG Shan, FENG Shou-Hua. Magnetocaloric Effect of La_0.62Ca_0.29K_0.09MnO₃ Epitaxial Film Prepared by Pulsed Laser Deposition[J]. Chem. J. Chinese Universities, 2013, 34(9): 2063.

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Magnetocaloric Effect of La_0.62Ca_0.29K_0.09MnO₃ Epitaxial Film Prepared by Pulsed Laser Deposition

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