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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4006

Title: Oxygen content of La_<1-x>Sr_xMnO_<3-y> thin films and its relation to electric-magnetic properties
Authors: Sakai, Joe
Ito, Nobuaki
Imai, Syozo
Issue Date: 2006-04
Publisher: AMERICAN INSTITUTE OF PHYSICS
Magazine name: Journal of Applied Physics
Volume: 99
Number: 8 part.2&3
Start page: 08Q318-1
End page: 08Q318-3
DOI: 10.1063/1.2176323
Abstract: It is known that the electric and magnetic properties of typical double-exchange materials La_<1-x>Sr_xMnO_<3-y>(LSMO) are strongly affected by oxygen nonstoichiometry y, as well as by divalent ion doping level x. In the present study, we fabricated LSMO (x=0.4) thin films on SrTiO_3 (STO) (001) and LaAlO_3 (LAO) (001) under various pressures of oxygen ambient Po_2, and evaluated their oxygen content 3−y using non-Rutherford elastic resonance spectroscopy. The change of their electric and magnetic properties was also measured and discussed. It was revealed that the oxygen content 3−y does not increase monotonically as Po_2 increases. Curie temperature T_C and insulator-metal transition temperature T_IM were correlated with 3−y for the films on STO. The film on LAO of a quite high Po_2 showed ferromagnetism and a metallic conductivity, unlike the films of lower Po_2's. The ferromagnetism is attributed to c/a axis ratio closer to that of the bulk.
Rights: Copyright 2006 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 Joe Sakai, Nobuaki Ito, Syozo Imai, Journal of Applied Physics 99(8-2&3), 08Q318 (2006) and may be found at http://link.aip.org/link/?jap/99/08Q318.
Type: Article
URI: http://hdl.handle.net/10119/4006
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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