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Enhanced magnetoresistance of La2/3Ca1/3MnO3/Sr2FeMoO6 core/cell nanocrystalline composites synthesized by polymer-network sol-gel method

Published online by Cambridge University Press:  31 January 2011

Lide Yao
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
Hua Yang
Affiliation:
State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
Qing Zhao
Affiliation:
Department of Physics, School of Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
Richeng Yu*
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: rcyu@aphy.iphy.ac.cn
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Abstract

This paper reports that the homogeneous nanocrystalline LCMO(core)/SFMO(shell) and SFMO(core)/LCMO(shell) series composites are successively synthesized using polymer-network sol-gel method. With the increase of SFMO content in the composites, the remanence magnetization Mr increases while the coercivity Hc decreases. This fact indicates that the ferromagnetic phase boosts up. Moreover, the LFMR (1 T) of the composites succeeds the preponderances of both SFMO and LCMO; i.e., the magnetoresistance (MR) value increases from 300 to 5 K and keeps a high level. In particular, the MR value of the LS-8 composite reaches 55% at 5 K and 7 T.

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Copyright
Copyright © Materials Research Society 2010

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Enhanced magnetoresistance of La2/3Ca1/3MnO3/Sr2FeMoO6 core/cell nanocrystalline composites synthesized by polymer-network sol-gel method
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