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Author Antonov, V. N. ♦ Perlov, A. Y. ♦ Oppeneer, P. M. ♦ Yaresko, A. N. ♦ Halilov, S. V.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ URANIUM ALLOYS ♦ MAGNETORESISTANCE ♦ NICKEL ALLOYS ♦ GALLIUM ALLOYS ♦ ANISOTROPY ♦ FERMI LEVEL ♦ ENERGY GAP
Abstract The giant magnetoresistance (MR) in UNiGa is investigated from first principles, using density-functional band-structure theory in the local approximation together with a linear-response ansatz for the conductivity. The MR is calculated to be very anisotropic, with a large value of {minus}(45{plus_minus}5){percent} for current in plane and a giant MR of {minus}(64{plus_minus}5){percent} for current perpendicular to plane. These values are in semiquantitative agreement with the measured MR. The basic mechanism of the giant MR is identified to be a superzone reconstruction of the Fermi surface at the field induced metamagnetic transition. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 77
Issue Number 26


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