Large Random-Field Behavior above the Vacancy Percolation Concentration Threshold: Fe0.84Zn0.16F2

Takuo Sakon, Satoshi Awaji, Mitsuhiro Motokawa, David P. Belanger

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5 Citations (Scopus)


High-field magnetization measurements, with H ≤ 20T, yield the random-field Ising model (RFIM) specific heat behavior near the H-T phase boundary in Fe0.84Zn0.16F2. This sample, with x greater than the magnetic vacancy percolation threshold, Xv = 0.754, is in the concentration range that shows equilibrium neutron scattering line shapes at low temperature and |q| > 0, unlike samples for which x < Xv. The temperature derivative of the uniform magnetization shows the expected low-field random-field Ising scaling behavior for H ≤ 18 T. At H = 20 T, however, the peak temperature and amplitude are significantly suppressed, indicating a high-field RFIM region of the H-T phase diagram.

Original languageEnglish
Pages (from-to)411-413
Number of pages3
JournalJournal of the Physical Society of Japan
Issue number2
Publication statusPublished - 2002 Feb


  • FeZnF
  • High magnetic fields
  • Magnetization
  • Random-field Ising model


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