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00-18E

00-18E


By icmp_admin - Posted on 08 February 2012

UDC: 
530.145
PACS: 
61.43.-j, 64.60.Ak

Phase transition in the random anisotropy model

M. Dudka
R. Folk
Yu. Holovatch

The influence of a local anisotropy of random orientation on a ferromagnetic phase transition is studied for two cases of anisotropy axis distribution. To this end a model of a random anisotropy magnet is analysed by means of a field theoretical renormalization group approach in two loop approximation refined by ressumation of asymptotic series. The one-loop result of Aharony indicating the absence of a 2nd order phase transition for isotropic distribution of random anisotropy axis at space dimension $d<4$ is corroborated. For a c cubic distribution the accessible stable fixed point leads to disordered Ising-like critical exponents.

Year: 
2000
Pages: 
10
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