Diluted antiferromagnets in a magnetic field : A fractal-domain state with spin-glass behavior

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Nowak_1991_DilutedAntiferromagnets.pdf
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1991
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Usadel, Klaus-Dieter
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Physical Review B. 1991, 44(14), pp. 7426-7432. Available under: doi: 10.1103/PhysRevB.44.7426
Zusammenfassung

The phase diagram of diluted Ising antiferromagnets in the limit of a high external magnetic field B and strong dilution is investigated by a Monte Carlo simulation. The two relevant lines in the B-T plane of the phase diagram, Beq(T) which marks the onset of hysteretic effects and Bc(T) above which antiferromagnetic long-range order is no longer stable are determined. Between these two lines there is a broad range of high fields and low temperatures with the characteristics of a frozen-domain state. The irreversibilities observed in this state and the scaling behavior of Beq(T) both give evidence for the occurrence of a spin-glass phase. A further investigation of the relevant scaling laws for the domains leads to the conclusion that the domain state consists of fractal domains becoming stable for high magnetic fields.

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ISO 690NOWAK, Ulrich, Klaus-Dieter USADEL, 1991. Diluted antiferromagnets in a magnetic field : A fractal-domain state with spin-glass behavior. In: Physical Review B. 1991, 44(14), pp. 7426-7432. Available under: doi: 10.1103/PhysRevB.44.7426
BibTex
@article{Nowak1991Dilut-5271,
  year={1991},
  doi={10.1103/PhysRevB.44.7426},
  title={Diluted antiferromagnets in a magnetic field : A fractal-domain state with spin-glass behavior},
  number={14},
  volume={44},
  journal={Physical Review B},
  pages={7426--7432},
  author={Nowak, Ulrich and Usadel, Klaus-Dieter}
}
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