Open AccessINTERACTION EFFECTS IN DILUTE MAGNETIC ALLOYS
Author(s) -
Zheng-zhong Li,
HU Xiao-xin,
WANG JIN-CAI
Publication year - 1985
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.34.145
Subject(s) - kondo effect , impurity , condensed matter physics , decoupling (probability) , electrical resistivity and conductivity , ion , exchange interaction , magnetic field , kondo insulator , physics , materials science , magnetic impurity , ferromagnetism , quantum mechanics , control engineering , engineering
In this paper, the influence of interaction between magnetic impurity ions on the Kondo effect is treated by using Green's function method under the condition Tk (Kondo temperature). A self-consistent-field approximation for s-d exchange Hamil-tonian is adopted. Both of the two types of the decoupling terms, which are responsible for single-ion Kondo effect and inter-ionic interaction respectively, are retained. The Kondo temperature and the low-temperature resistivity for impurity system have been calculated. The results indicate that in dilute magnetic alloys interaction effects will decrease Tk and make the ρ-T curve in the region T《 Tk changes from 1-AT2 to 1 + BT2, with A,B > 0. Thus a resistivity maximum may probably be observed in the temperature region T k.