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Abstract:
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The authors studied the conduction mechanism in an uranium doped low dimensional magnetic system
Ca2CuO3. 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 á, the characteristic for hopping probability, was determined to be 0.18
Å−1. This value manifests a relatively stronger hopping probability for Ca2CuO3 as compared with other uranium
doped ceramics. |