• Title/Summary/Keyword: $La_{0.35}Pr_{0.35}Ca_{0.3}MnO_3$

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Growth of La0.35Pr0.35Ca0.3MnO3/LaAlO3 Thin Film using Laser Molecular-Beam Epitaxy and its Magnetic Properties (Laser Molecular-Beam Epitaxy를 이용한 La0.35Pr0.35Ca0.3MnO3/LaAlO3 초격자 박막의 합성과 그 자기적 특성의 연구)

  • Seung, S.K.;Song, J.H.
    • Journal of the Korean Magnetics Society
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    • v.21 no.3
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    • pp.93-98
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    • 2011

  • We successfully grew $La_{0.35}Pr_{0.35}Ca_{0.3}MnO_3$(LPCMO)/$LaAlO_3$(LAO) thin film using Laser Molecular-Beam Epitaxy and studied post-growth annealing effects ($750^{\circ}C$, 5 h) on its crystal structural and magnetic properties. Whereas the single-layered LPCMO and LPCMO/STO superlattice thin films show rough surface before and after the post-growth annealing, LPCMO/LAO superlattice shows a relatively very flat surface even after the post-growth annealing. The enhancement of ferromagnetism of LPCMO/LAO superlattice after the post-growth annealing was remarkable compared to the single-layered LPCMO thin film. The coercive and saturation magnetic field of the single-layed LPCMO thin film were decreased after the post-annealing. However, for LPCMO/LAO superlattice, a same coercive and increased saturation magnetic field were exhibited after post-growth annealing. We suggest that these peculiar observations are originate from the super-structure of LPCMO and LAO.

  • https://doi.org/10.4283/JKMS.2011.21.3.093 인용 PDF KSCI

Magnetic Properties of Multilayered and Mixed $Pr_{0.65}$Ca_{0.35}MnO_3/La_{0.7}Sr_{0.3}MnO_3$ Films

  • V. G. Prokhorov;Lee, Y. P.;V. S. Flis;Park, J. S.
    • Journal of the Korean Vacuum Society
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    • v.12 no.S1
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    • pp.67-69
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    • 2003

  • The magnetic properties of single- and poly-crystalline $La_{0.7}Sr_{0.3}MnO_3/Pr_{0.65}Ca_{0.35}MnO_3$ multilayered (ML) films, and composite (CP) $(La_{0.7}Sr_{0.3})_{0.5}(Pr_{0.65}Ca_{0.35}_{0.5}MnO_3$ films, prepared by laser ablation, have been investigated in a wide temperature range. It was shown that the transformation from an incoherent to a coherent interface in the ML films leads to an enhancement of the ferromagnetic coupling between layers and to a single-phase magnetic transition. The amorphous CP films demonstrate a paramagnetic behavior of the magnetization with a sharp peak at $T_{G}\approx$45 K, which was interpreted as the formation of Griffiths phase. A short-term annealing at $750^{\circ}C$ induced the complete crystallization of film, and a recovery of the ferromagnetic and the metal-insulator transitions.

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