| Original Articles |
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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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| Cite this article: |
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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.
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| Keywords:
75.70.Pa
75.30.Kz
71.30.+h
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Published: 01 November 2000
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| PACS: |
75.70.Pa
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75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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