Metglas 2826B—Transport, magnetic and thermal properties

Abstract

We report Hall resistivity, magnetization, heat capacity, and electrical resistivity studies on Metglas 2826B (Fe₂₉Ni₄₉P₁₄B₆Si₂) spanning the temperature regime 77 to 800 K. The critical exponents for this system are found to be β=0.40±0.01, δ=5.25±0.10, and γ=1.7±0.1. The magnetic isotherms fit into universal scaling functions over a rather wide range of temperature both above and below T_c. The specific heat exhibits a sharp peak at T_c. The temperature derivative of the electrical resistivity has a marked change at T_c. Although T_c increases slightly on thermal cycling to higher temperatures, the critical exponents are not influenced by this.