The Anomalous Low Temperature Electrical Resistivity Properties of Dilute Magnetic Alloys
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Date
2007-07
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Addis Ababa University
Abstract
The existence of localized magnetic moments in dilute magnetic alloys that couple to the
conduction electrons has important consequences for the electrical resistivity. The magnetic
impurities act as scattering centers, and if they are the predominant type of impurity then at low
enough temperature the scattering causes the electrical resistivity. The exchange interaction
between the conduction and the localized moments leads to scattering events in which the
electron spin is flipped. Calculating the transition probabilities of the conduction electrons to
the third order of interaction it is shown that the transition probability has a logarithmic
anomaly at the Fermi-surface and that in the resistivity there appears a term proportional to lnT
and diverges as the temperature approaches zero.
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Keywords
Electrical Resistivity Properties