Journal of Magnetics

  • 제13권4호
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  • Pages.132-135
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  • 2008
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  • 1226-1750(pISSN)
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  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
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Phonon-Assisted Electron Hopping Conduction in the Uranium Doped One-Dimensional Antiferromagnet Ca2CuO3

  • Thanh, Phung Quoc (Center for Materials Science, College of Science, Vietnam National University) ;
  • Yu, Seong-Cho (Department of Physics, Chungbuk National University) ;
  • Nhat, Hoang-Nam (Center for Materials Science, College of Science, Vietnam National University)
  • 발행 : 2008.12.31
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초록

The authors studied the conduction mechanism in an uranium doped low dimensional magnetic system $Ca_2CuO_3$. This system exhibits the S=1/2 quasi 1D antiferromagnetic chains of -Cu-O- with strong magnetic coupling, and demonstrates continuous semiconductor-like behavior with constant covalent insulator character. This paper identifies the conduction is due to thermally activated phonon-assisted electron hopping between dopant uranium sites. The parameter a, the characteristic for hopping probability, was determined to be 0.18 ${\AA}^{-1}$. This value manifests a relatively stronger hopping probability for $Ca_2CuO_3$ as compared with other uranium doped ceramics.

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참고문헌

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