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Electrical Resistivity of Chromium–Gold Alloys between 77 and 700 K
Author(s) -
Eroglu A.,
Arajs S.,
Moyer C. A.,
Rao K. V.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220870133
Subject(s) - electrical resistivity and conductivity , condensed matter physics , materials science , impurity , chromium , antiferromagnetism , fermi level , alloy , gold alloys , electron , density of states , metallurgy , chemistry , physics , nuclear physics , organic chemistry , quantum mechanics
Abstract Electrical resistivity is measured as a function of temperature of binary chromium alloys containing 0.27, 0.54, and 0.60 at% gold. Gold decreases the Néel temperature linearly at a rate of 32 K/at% gold. Such a decrease is contrary to the predictions of conventional models for the antiferromagnetism in dilute chromium alloys, but can be explained if the excess nuclear charge on gold impurities is totally screened by the band electrons. Total screening also is consistent with the observed temperature variation of resistivity well above the transition temperature if, as seems reasonable, the scattering of electrons from gold impurities reduces the electronic density of states of the alloy at the Fermi energy.