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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4168

Title: Ferromagnetism at room temperature in La-Ba-Ca-Mn-O thin films
Authors: Hoa Hong, Nguyen
Sakai, Joe
Imai, Syozo
Issue Date: 2001-06-01
Magazine name: Journal of Applied Physics
Volume: 89
Number: 11
Start page: 6976
End page: 6978
DOI: 10.1063/1.1358335
Abstract: The effects of substitution of Ca by Ba in La_<1-x>Ca_xMnO_3 (LCMO) with x<0.5 were investigated systematically in order to clarify the role of the size of the A cations. As for the La_<1-x>(Ba-Ca)_xMnO_3 (LBCMO) films of ferromagnetic metallic (FMM) region (x=0.2; 0.3; and 0.4), by doping Ba, the ferromagnetic transition temperature (T_C) and the insulator-to-metal (IM) transition temperature (T_<IM>) were improved about 30-60 K, compared with those of LCMO thin films with the same ratio of Mn^<3+>:Mn^<4+>. Especially, La_<0.7>Ba_<0.1>Ca_<0.2>MnO_3 thin films have an anomalously high T_C (about room temperature) and a T_<IM> of 275 K under zero field. In the ferromagnetic insulating (FMI) region (x=0.15; 0.1), the Ba doping enables the IM transition and remarkably heightens the T_C as well. The phase diagram shows that in the slightly doped region (x<0.5), Ba doping has made the FMM phase significantly expanded.
Rights: Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Hong, N.H., Sakai, J., Imai, S., Journal of Applied Physics 89(11), 6976-6978 (2001) and may be found at http://link.aip.org/link/?JAPIAU/89/6976/1 .
URI: http://hdl.handle.net/10119/4168
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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