Chin. Phys. Lett.  2000, Vol. 17 Issue (11): 832-834    DOI:
Original Articles |
Enhancement of Curie Temperature and Magnetoresistance in the Perovskit es La2/3Cal/3Mnl-xSixO3
LI Run-Wei;WANG Zhi-Hong;SUN Ji-Rong;CHEN Xin;SHEN Bao-Gen
State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
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LI Run-Wei, WANG Zhi-Hong, SUN Ji-Rong et al  2000 Chin. Phys. Lett. 17 832-834
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Abstract Structural, magnetic, and transport properties of perovskite La2/3Cal/3Mnl-xSixO3(x = 0, 0.025, 0.05) have been studied. The incorporation of Si decreases the overall resistivity, but obviously increases the Curie temperature (TC), metal-insulator transition temperature (TP), and the magnetoresistance ratio MR (defined as [R(0) - R(H)]/R(0)) near room temperature. Comparing with La2/3Cal/3MnO3 the TC , TP, and MR of the sample with x = 0.05 increase by 30, 45K, and 20%, respectively. Lattice effects may play a more important role than the magnetic dilution in the case of low Si substitution.
Keywords: 75.70.Pa      75.30.Kz      71.30.+h     
Published: 01 November 2000
PACS:  75.70.Pa  
  75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))  
  71.30.+h (Metal-insulator transitions and other electronic transitions)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2000/V17/I11/0832
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LI Run-Wei
WANG Zhi-Hong
SUN Ji-Rong
CHEN Xin
SHEN Bao-Gen
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