Anomalous Angular Dependence of Magnetoresistance in MCl2-GIC's (M=Cu and Co)
作者:
Hirohiko Sato,
Toshiaki Enoki,
ItsukoS. Suzuki,
Masatsugu Suzuki,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 340,
issue 1
页码: 19-24
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008025436
出版商: Taylor & Francis Group
关键词: graphite intercalation compounds;transition metal chlorides;magnetoresistance;antiferromagnetic transition;dimensional crossover;quantum oscillation
数据来源: Taylor
摘要:
Angular dependence of thec-axis magnetoresistance of stage-1 and stage-2 MCI2GIC (M=Cu and Co) was measured. Stage-1 CuCl2GIC shows an angular dependent magnetore-sistance oscillation (ADMRO) characteristic in the systems having a periodically-warped cylindrical Fermi surface (FS). This means that the conduction along thec-axis is band-like in spite of extremely large anisotropy in conductivity. On the other hand, the angular dependence of the magnetoresistance of stage-2 CuCl2GIC and stage-1 CoCl2GIC can be interpreted as the mixture of ADMRO based on a band conduction and incoherent interlayer hopping. Stage-2 CoCl2GIC shows only incoherent hopping. In low magnetic field region, thec-axis resistances of stage-1 and stage-2 CoCl2GIC are affected by the magnetic phase transitions. Spin-dependent tunneling effect can explain this phenomenon.
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