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Giant magnetoresistance in bulk La0.6Mg0.4MnO3

Published online by Cambridge University Press:  31 January 2011

Yadong Li ,
X. F. Duan ,
J. H. Zhang ,
H. R. Wang ,
Y. T. Qian ,
Z. Huang ,
J. Zhou ,
S. L. Yuan ,
W. Liu  and
C. F. Zhu
Yadong Li
Affiliation:
Department of Applied Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, People's Republic of China
X. F. Duan
Affiliation:
Department of Applied Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, People's Republic of China
J. H. Zhang
Affiliation:
Department of Applied Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, People's Republic of China
H. R. Wang
Affiliation:
Department of Applied Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, People's Republic of China
Y. T. Qian
Affiliation:
Department of Applied Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, People's Republic of China
Z. Huang
Affiliation:
High Magnetic Laboratory, Institute of Plasma Physics, Academia Sinica, Hefei, Anhui 230031, People's Republic of China
J. Zhou
Affiliation:
High Magnetic Laboratory, Institute of Plasma Physics, Academia Sinica, Hefei, Anhui 230031, People's Republic of China
S. L. Yuan
Affiliation:
High Magnetic Laboratory, Institute of Plasma Physics, Academia Sinica, Hefei, Anhui 230031, People's Republic of China
W. Liu
Affiliation:
Laboratory of Internal Friction and Defects in Solids, Academia Sinica, USTC, Hefei, Anhui 230026, People's Republic of China
C. F. Zhu
Affiliation:
Laboratory of Internal Friction and Defects in Solids, Academia Sinica, USTC, Hefei, Anhui 230026, People's Republic of China
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Abstract

A bulk sample of La0.6Mg0.4MnO3 has been prepared from coprecipitated carbonate precursor for the first time in this study. Structure analysis conducted by powder x-ray diffraction indicates that the sample is in the cubic perovskite phase. It shows a metal-insulator transition at 115 K (Tp) When applied to an external field, GMR effects are observed in the whole measured temperature range. The maximum negative MR value reaches as large as 480% at 105 K and 5 T. There may be two different mechanisms governing the GMR effects in the sample for the temperatures below and above Tp.

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Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 10 , October 1997 , pp. 2648 - 2650
Copyright
Copyright © Materials Research Society 1997

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