Department of Physics Papers

Document Type

Conference Paper

Date of this Version

1972

Publication Source

AIP Conference Proceedings

Volume

5

Start Page

1345

DOI

10.1063/1.2953872

Abstract

The energy of long wave length spin waves in dilute Heisenberg ferromagnets is calculated. It is shown that spin waves can exist only within an infinite cluster of magnetic spins and that such spin waves are mechanically stable. Heuristic arguments based on dimensionality of the infinite cluster imply that there is no thermal instability of the type discussed by Mermin and Wagner. Thus, the critical concentration for ferromagnetism is essentially equal to percolation concentration.

Copyright/Permission Statement

Reprinted with permission from AIP Conference Proceedings. Copyright 1972, American Institute of Physics.

Comments

Proceedings of Magnetism and Magnetic Materials conference, 1971, Chicago, IL.

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Date Posted:07 July 2015