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Static universality class implied by the critical exponents of Gd

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
Structural characteristics and available critical exponent measurements fail to distinguish clearly between Ising and Heisenberg critical behavior in Gd. In this context we present a new perturbed ..gamma gamma..-angular correlation measurement of the exponent ..beta.. which appears to resolve the ambiguity. From our result, ..beta.. = 0.399(16), we conclude that Gd is described by Heisenberg critical behavior for reduced temperatures epsilon>10/sup -3/. This does not exclude crossover to another value for smaller epsilon.
Research Organization:
Department of Physics, Clark University, Worcester, Massachusetts 01610
OSTI ID:
5774566
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:9; ISSN PRBMD
Country of Publication:
United States
Language:
English