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Exchange Interactions in Dilute AgMn Alloys at Helium Temperatures
Author(s) -
Chari M. S. R.
Publication year - 1965
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.19650090113
Subject(s) - electrical resistivity and conductivity , condensed matter physics , metal , manganese , helium , materials science , crystallite , liquid helium , magnetic field , rod , thermodynamics , chemistry , metallurgy , physics , medicine , alternative medicine , organic chemistry , pathology , quantum mechanics
The expression for the decrease in electrical resistivity below the temperature of magnetic ordering, derived on the basis of the Kasuya‐Yosida model for dilute alloys containing a transitional metal solute has been modified recently by Collings, Hedgcock, and Muto, in order to take the resistivity minimum into account. This is used here to estimate the exchange interaction parameter in polycrystalline rods of silver containing respectively 0.14, 0.32 and 0.55 at.‐% of manganese in random solid solution. The prediction of the model as to the variation of the electronic Lorenz parameter, in these alloys at liquid helium temperatures, with applied magnetic field and temperature are found to agree qualitatively with the behaviour inferred from experimental results.