Temperature Dependence of Local Magnetic Moments in Paramagnetic Metals: Hubbard's Alloy Analogy.
ROCHESTER UNIV N Y DEPT OF PHYSICS AND ASTRONOMY
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The temperature T dependence of the local magnetic moments and the static uniform spin susceptibility chi T in paramagnetic metals is studied using the Hubbard Hamiltonian for non-degenerate bands. Hubbards alloy analogy, which correctly describes both strongly interacting and weakly interacting systems of electrons, is applied to determine the average local moment magnitude. It is found that the magnetic moment magnitude decreases gradually with temperature and does not undergo a phase transition to a zero value. This is in contrast to the results of previous theories which predict a sharp phase transition associated with a disappearance at high temperatures of the moments. Author
- Solid State Physics