Effect of Cr and Fe substitutions on the magnetotransport properties of the charge-ordered manganite La_0.4Ca_0.6MnO₃

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• 作者：Sudyoadsuk ; T. ; Suryanarayanan ; R. ; Winotai ; P.
• 关键词：75.47.Gk ; 77.84 ; 75.60.Ej ; Manganites ; La_0.4Ca_0.6Mn_0.8Cr_0.2O₃ ; La_0.4Ca_0.6Mn_0.8Fe_0.2O₃ ; Magnetoresistance ; Spin-cluster glass
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2004
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：May, 2004
• 卷：272-276
• 期：Supplement
• 页码：E1379-E1382
• 文件大小：230 K

摘要

The charge order-like transition observed at 260K in La_0.4Ca_0.6MnO₃ is suppressed by 20%Cr or Fe substitution at Mn site. Whereas no magnetoresistance (MR) was observed in the parent compound, even in a field of 14T, a sizeable MR is observed in the substituted samples. However, at 50K in a field of 5T, the MR of the Cr-doped sample was larger by a factor of 10 compared with that of Fe-doped one.