Fractal effects on excitations in dilute ferromagnets

Deepak Kumar, (1982) Fractal effects on excitations in dilute ferromagnets Physical Review B, 25 (3). pp. 2069-2072. ISSN 0163-1829

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The long-wavelength spin-wave excitations in dilute ferromagnets are studied. With the use of a fractal model for the backbone of the infinite percolating cluster of Kirkpatrick, a new relation is obtained between the percolation exponents and the exponent characterizing the vanishing of spin-wave stiffness. This also enables us to express the conductivity exponent in terms of various percolation exponents. For dilute magnets the importance of fractal effects in the calculation of density of states and the low-temperature thermodynamics is pointed out.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:9904
Deposited On:02 Nov 2010 10:29
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