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Quenched-vacancy induced spin-glass order

Author(s)
Gulpinar, Gul; Berker, A. Nihat
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Abstract
The ferromagnetic phase of an Ising model in d=3, with any amount of quenched antiferromagnetic bond randomness, is shown to undergo a transition to a spin-glass phase under sufficient quenched bond dilution. This result, demonstrated here with the numerically exact global renormalization-group solution of a d=3 hierarchical lattice, is expected to hold true generally, for the cubic lattice and for quenched site dilution. Conversely, in the ferromagnetic–spin-glass–antiferromagnetic phase diagram, the spin-glass phase expands under quenched dilution at the expense of the ferromagnetic and antiferromagnetic phases. In the ferromagnetic–spin-glass phase transition induced by quenched dilution, reentrance as a function of temperature is seen, as previously found in the ferromagnetic–spin-glass transition induced by increasing the antiferromagnetic bond concentration.
Date issued
2009-02
URI
http://hdl.handle.net/1721.1/51803
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review E
Publisher
American Physical Society
Citation
Gulpinar, Gul, and A. Nihat Berker. “Quenched-vacancy induced spin-glass order.” Physical Review E 79.2 (2009): 021110. © 2009 The American Physical Society.
Version: Final published version
ISSN
1550-2376
1539-3755

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