Magnetic phase diagram of Nd0.5Ca0.5-ySryMnO3

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Title:	Magnetic phase diagram of Nd0.5Ca0.5-ySryMnO3
Authors:	Kumary, T. Geetha Cheng, S. L. Lin, J. G. Chiang, Wen-C.
Contributors:	物理系
Keywords:	COLOSSAL MAGNETORESISTANCE MANGANITES ND0.5CA0.5MNO3 TRANSITIONS CHARGE ORDER
Date:	2007
Issue Date:	2009-11-13 14:54:03 (UTC+8)
Abstract:	The phase diagram obtained for Nd0.5Ca0.5-ySryMnO3 from the temperature dependent magnetization and electron spin resonance measurements are presented in this paper. It is found from magnetization measurements that y=0.25 is a critical point where a magnetic transformation occurs, accompanied by a nonmonotonic variation in the c lattice parameter. Below a certain transition temperature, compounds with y < 0.25 exhibit charge ordering and those with y >= 0.25 show ferromagnetic ordering. An antiferromagnetic transition occurs for y=0 at still lower temperatures whereas a phase separation into antiferromagnetically and ferromagnetically ordered states occurs for 0 < y <= 0.5. Electron spin resonance analysis shows that the phase separation occurs at temperatures above the ferromagnetic transition temperature in all the compounds with y > 0. (C) 2007 American Institute of Physics.
Relation:	JOURNAL OF APPLIED PHYSICS Volume: 101 Issue: 9 Article Number: 093910
Appears in Collections:	[Department of Physics ] journal articles

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