Abstract

Comprehensive study on the critical behavior and magnetocaloric properties of Fe30Cr45V25 is carried out. The ferromagnetic alloy undergoes a second-order magnetic phase transition at TC = 300 K. The critical exponents of Fe30Cr45V25 are β = 0.380, γ = 1.293, and δ = 4.389. Although the obtained exponents do not fall into any conventional universal classes (slightly relatable with 3D Heisenberg type), they get renormalized around TC and obey the Widom scaling relation, ascribed to the reliability of the calculation. 3D Heisenberg type (isotropic) spin alignment is suggested by the renormalization group approach. However, the interaction strength is of long-range order. Further, the magnetic entropy change (ΔSm) and relative cooling power for an applied field of 70 kOe are −0.89 J kg−1 K−1 and 184.84 J kg−1 at 308 K. The system exhibits almost constant ΔSm over a broad temperature range with negligible hysteresis, a favorable feature for solid-state regenerators.

Karunakaran M

Research Scholar

My research focuses on exploring the electronic and magnetic properties of disordered Heusler alloys.

Rudra Banerjee

Assistant Professor, Computational Condensed Matter

My research interests include Computational Physics, disordered materials and thermodynamics.