Original Articles |
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Correction to the Metal-Insulator Transition Temperature due to
Cation Size and Strain Effects for Colossal Magnetoresistance
Perovskites |
YUAN Song-Liu;LIU Jie;XIA Zheng-Cai;PENG Gang;TANG Jie;ZHANG Guo-Hong;ZHANG Li-Jiang;FENG Wen;LI Zhong-Yi;YANG Ying-Ping;LIU Li;XIONG Cao-Shui |
Department of Physics, Huazhong University of Science and
Technology, Wuhan 430074 |
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Cite this article: |
YUAN Song-Liu, LIU Jie, XIA Zheng-Cai et al 2002 Chin. Phys. Lett. 19 1675-1678 |
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Abstract A phenomenological expression of the metal-insulator transition temperature is proposed for AMnO3 manganese perovskites by taking into account the distortion of Mn-O-Mn bond due to A-cation size and the strain-dependent effect due to performed Jahn-Teller distortions, independently. Using reasonable physical parameters, the calculated results give excellent agreement with experimental data obtained in polycrystalline samples of La2/3(Ca1-xBax)1/3MnO3, providing a strong support to this approach.
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Keywords:
71.30.+h
75.30.Vn
75.30.Kz
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Published: 01 November 2002
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PACS: |
71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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75.30.Vn
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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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