Field-dependent specific heat in Fe2 VAl and the question of possible 3d heavy fermion behavior

C. S. Lue, Joseph H. Ross, C. F. Chang, H. D. Yang

研究成果: Article

84 引文 斯高帕斯(Scopus)

摘要

Specific heat measurements on Fe2 VAl show the previously reported upturn in electronic specific heat coefficient (γ) to be sample dependent, and related to magnetic defects. These measurements, in temperatures as low as 0.6 K and magnetic fields up to 8 T, indicate the presence of Schottky anomalies arising from magnetic clusters having a moment 3.7μB This result is in good agreement with theoretical estimates for Fe antisite defects in the material. The inherent γ = 1.5 ± 0.3 mJ/molK2 deduced from this work is considerably less than previously reported, and the behavior does not appear consistent with heavy fermion behavior. However, the mass enhancement is significant when compared to nuclear magnetic resonance and band calculations, and we propose a spin-fluctuation mechanism.

原文English
頁(從 - 到)R13941-R13945
期刊Physical Review B - Condensed Matter and Materials Physics
60
發行號20
DOIs
出版狀態Published - 1999 一月 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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