Huge magnetoresistance effect of highly oriented pyrolytic graphite | Zendy

Du You-Wei | Zendy; Zhiming Wang | Zendy; Gang Ni | Zendy; Xing Ding-Yu | Zendy; Xu Qing-Yu | Zendy

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Huge magnetoresistance effect of highly oriented pyrolytic graphite

Author(s) -

Du You-Wei,

Zhiming Wang,

Gang Ni,

Xing Ding-Yu,

Xu Qing-Yu

Publication year - 2004

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.53.1191

Subject(s) - magnetoresistance , graphite , highly oriented pyrolytic graphite , pyrolytic carbon , condensed matter physics , semimetal , materials science , insulator (electricity) , magnetic field , colossal magnetoresistance , physics , chemistry , metallurgy , optoelectronics , organic chemistry , quantum mechanics , pyrolysis , band gap

Graphite is a quasi-two-dimensional semimetal. However, for usual graphite the magnetoresistance is not so high due to its small crystal size and no preferred orientation. Huge positive magnetoresistance up to 85300% at 4.2 K and 4950% at 300 K under 8.15 T magnetic field was found in highly oriented pyrolytic graphite. The mechanism of huge positive magnetoresistance is not only due to ordinary magnetoresistance but also due to magnetic-field-driven semimetal-insulator transition.

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