• Rapid Communication

Field-dependent specific heat in Fe2VAl and the question of possible 3d heavy fermion behavior

C. S. Lue, Joseph H. Ross, Jr., C. F. Chang, and H. D. Yang
Phys. Rev. B 60, R13941(R) – Published 15 November 1999
PDFExport Citation

Abstract

Specific heat measurements on Fe2VAl 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±0.3mJ/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.

  • Received 19 August 1999

DOI:https://doi.org/10.1103/PhysRevB.60.R13941

©1999 American Physical Society

Authors & Affiliations

C. S. Lue* and Joseph H. Ross, Jr.

  • Department of Physics, Texas A&M University, College Station, Texas 77843-4242

C. F. Chang and H. D. Yang

  • Department of Physics, National Sun Yat-Sen University, Kaohsiung, Taiwan

  • *Electronic address: c0l9877@unix.tamu.edu
  • Electronic address: jhross@tamu.edu

References (Subscription Required)

Click to Expand
Issue

Vol. 60, Iss. 20 — 15 November 1999

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×