Site-diluted quantum Heisenberg spin model applied to the magnetic properties of Fe–Al disordered alloys
M Salazar, LE Zamora, GAP Alcazar, JA Plascak… - Physica B: Condensed …, 2002 - Elsevier
In this work we present a theoretical study of the magnetic behavior of disordered Fe–Al
alloys on the basis of a simple-diluted quantum Heisenberg spin model with the assumption
that the exchange interaction J depends on the Al concentration q. We calculated the critical
temperature and exponents through the mean field renormalization group method. An
acceptable fit to the experimental phase diagram for Al concentration in the range 0.30⩽ q⩽
0.45 is obtained.
alloys on the basis of a simple-diluted quantum Heisenberg spin model with the assumption
that the exchange interaction J depends on the Al concentration q. We calculated the critical
temperature and exponents through the mean field renormalization group method. An
acceptable fit to the experimental phase diagram for Al concentration in the range 0.30⩽ q⩽
0.45 is obtained.
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