Computer simulations of a three-dimensional Ising ferromagnet with quenched disorder

B. Bakó, I. Groma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Recent high-resolution x-ray and neutron-scattering experiments for various crystals with quenched defects of the random temperature type near magnetic and structural phase transitions have revealed two different length scales. The coexistence of two scales was interpreted as a superposition effect of scattering from the disordered layer containing defects, i.e., the surface layer (resulting in the larger correlation length) and from the bulk of the sample (resulting in the shorter one which corresponds to the usual critical fluctuation). Later, experimental evidence was found for the coexistence of both scales in the same volume fraction of the sample. In our investigations the phase transition in an Ising ferromagnet containing edge dislocation dipoles is considered. The results of our computer simulations also show that the two different length scales observed in real crystals appear in the same volume fraction.

Original languageEnglish
Pages (from-to)9228-9231
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number13
Publication statusPublished - 1999

Fingerprint

Volume fraction
computerized simulation
Phase transitions
disorders
Edge dislocations
Defects
Crystals
Computer simulation
Neutron scattering
Scattering
X rays
defects
edge dislocations
x ray scattering
crystals
surface layers
neutron scattering
Experiments
dipoles
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Computer simulations of a three-dimensional Ising ferromagnet with quenched disorder. / Bakó, B.; Groma, I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 13, 1999, p. 9228-9231.

Research output: Contribution to journalArticle

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