Phase stability study of La1.2Ca1.8Mn2O7

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题名:	Phase stability study of La1.2Ca1.8Mn2O7
作者:	Shen CH Liu RS Lin JG Huang CY
贡献者:	材料所
关键词:	inorganic compounds oxides magnetic materials crystal structure
日期:	2001
上传时间:	2009-12-11 11:34:42 (UTC+8)
摘要:	We report that the composition of La1.2Ca1.8Mn2O7 does not form as a single phase, and consists of a mixture: of La0.6Ca0.4MnO3 and CaO. The XRD patterns show the presence of a peak at 2 theta similar to 37 degrees, which is a specific peak to indicate the existence of CaO with space group Fm3m and a unit cell of a = 4.8152(3) Angstrom. After a few days, the intensity of this peak decreases and CaO transforms to Ca(OH),. The electrical and magnetic measurements show that the colossal magnetoresistance (CMR) behavior corresponds to that exhibited by La0.6Ca0.4MnO3. (C) 2001 Elsevier Science Ltd. All rights reserved.
關聯:	MATERIALS RESEARCH BULLETIN Volume: 36 Issue: 5-6 Pages: 1139-1148
显示于类别:	[Department of Chemical & Materials Engineering] journal articles

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