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Kondo‐Type Resistivity Anomaly in Noble Metal Alloys with 3d Metals
Author(s) -
Inoue K.,
Nakamura Y.
Publication year - 1973
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.2220580136
Subject(s) - electrical resistivity and conductivity , alloy , materials science , impurity , kondo effect , metal , analytical chemistry (journal) , transition metal , metallurgy , condensed matter physics , atmospheric temperature range , anomaly (physics) , chemistry , thermodynamics , physics , biochemistry , organic chemistry , chromatography , quantum mechanics , catalysis
The electrical resistivities of the f.c.c. Au‐V, Au‐Mn, Au‐Fe, and Au‐Ni alloys with high concentration of 3d‐element impurities have been measured from 4 to 1000 K. The results were analyzed together with other data for Au‐Cr, Au‐Co, Ag‐Mn, Cu‐Mn, and Cu‐Ni alloys. At high temperatures, the decrease of magnetic resistivity with increasing temperature is observed for Au‐V, Au‐Cr, Au‐Mn, Au‐Fe, Au‐Co, Ag‐Mn, and Cu‐Mn alloys and is expressed empirically by the equation R mag ( T ) = ‐ c (Y + Z c) ln ( T 2 + + X 2 c 2 ) 1/2 + c (R 1 + R 2 c ), except for Au‐Co alloys, where c is the concentration of 3d element, T the temperature, and X , Y , Z , R 1 , and R 2 are constants. Yc coincides with the coefficient of ln T in each dilute alloy. R 1 , c coincides with the temperature independent term in each dilute alloy. Xc is nearly of the same order as the RKKY interaction strength. Au‐Ni and Cu‐Ni alloys do not show such a decrease. The maximum of magnetic resistivity observed for Au‐Cr, Au‐Mn, Au‐Fe, Ag‐Mn, and Cu‐Mn alloys is explained by the destruction of very short range ordering, such as pairs and triplets, remaining far above the Néel temperature.