Kondo-like behavior and GMR effect in granular Cu90Co10 microwires | Zendy

V. Zhukova | Zendy; J. Mino | Zendy; J. J. del Val | Zendy; R. Varga | Zendy; Germán Martínez | Zendy; M. N. Baibich | Zendy; M. Ipatov | Zendy; А. Zhukov | Zendy

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Kondo-like behavior and GMR effect in granular Cu90Co10 microwires

Author(s) -

V. Zhukova,

J. Mino,

J. J. del Val,

R. Varga,

Germán Martínez,

M. N. Baibich,

M. Ipatov,

А. Zhukov

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4973291

Subject(s) - annealing (glass) , impurity , materials science , electrical resistivity and conductivity , kondo effect , condensed matter physics , giant magnetoresistance , magnetoresistance , ion , lamellar structure , nanostructure , metal , magnetic field , nanotechnology , chemistry , metallurgy , physics , organic chemistry , quantum mechanics

We observed a significant increase of the giant magnetoresistance (GMR) effect (up to 32% after the adequate annealing) and Kondo-like behavior in Cu90Co10 glass-coated microwires. Observed enhancement of the GMR effect can be interpreted considering the formation of the fine Co grains inside the Cu matrix as well as appearance of lamellar nanostructures allowing enhancement of the MR effect after annealing. Observed experimental data are discussed considering the regions with higher Co-ions content responsible for the presence of Co inhomogeneities or clusters and the regions with lower Co-ions content behaving as the magnetic impurities in the metallic host. Observed resistivity minimum on temperature dependence can be described considering Kondo effect mechanism involving magnetic impurities in metals. But the other mechanisms responsible for the resistivity minimum have been considered

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