Thermal Hysteresis Control in Fe49Rh51 Alloy through Annealing Process

Abstract

We report the results of studies of the magnetic and transport properties of Fe49Rh51 alloy prepared by different sequences of quenching and the annealing process. The temperature dependences of the relative initial magnetic permeability and resistivity are analyzed. An optimal regime consisting of annealing at 1300 K for 440 min and quenching from 1300 K to 275 K is found to observe the desired narrow antiferromagnetic–ferromagnetic transition in Fe49Rh51 alloy under cyclic conditions. This has the potential to increase the efficiency of cooling devices based on the magnetocaloric effect of magnetic materials with a first-order field-induced phase transition.

Correlation between magnetic and crystal structural sublattices in palladium-doped FeRh alloys: Analysis of the metamagnetic phase transition driving forces

“…Since synthesizing the FeRh single-phase samples is challengeable [37,44,45], a method of sample preparation using arc melting was developed, which makes it possible to minimize the phase with B1-type structure content in the sample. Alloys with the compositions of Fe 50 Rh 50 , Fe 50 Rh 47 Pd 3 and Fe 50 Rh 45 Pd 5 were synthesized by arc melting in an argon atmosphere.…”

Thermodynamics, Energy Dissipation, and Figures of Merit of Energy Storage Systems—A Critical Review

“…During the cold season, the operation of the refrigeration cycle is reversed to a heat pump that heats up the molten thermal hysteresis material at a temperature higher than 45 • C. The solidification of the material supplies heat to the building and keeps the interior temperature at the desired level. Significant research has been conducted for the discovery and commercial development of thermal hysteresis materials that would accomplish similar functions for domestic comfort in buildings [220][221][222].…”

“…Energies 2021, 14, x FOR PEER REVIEW 28 of 41 development of thermal hysteresis materials that would accomplish similar functions for domestic comfort in buildings [220][221][222].…”

Effect of Magnetic Field and Hydrostatic Pressure on Metamagnetic Isostructural Phase Transition and Multicaloric Response of Fe49Rh51 Alloy

“…The FeRh alloys are convenient model objects for studying the nature of the MIPT, due to their simple crystal structure and the bright effects observed near T m . There are several methods to control the MIPT temperature in FeRh alloys such as a magnetic field [5], a hydrostatic pressure [6], an electric field-induced strain [7][8][9], a heat treatment [10,11], a chemical substitution [12], and an ion irradiation [13]. The first studies of the temperature dependences of magnetization, Young's modulus, and the crystal lattice parameter were carried out via dilatometric method on the equiatomic alloy Fe 50 Rh 50 [2], and the rates of MIPT temperature shift dT m /dP and dT m /µ 0 dH in the hydrostatic pressure p and the magnetic field µ 0 H were estimated.…”