Magnetic and Magnetocaloric Properties
of Ho1 – xYx(Co0.84Fe0.16)2 Compounds
M. S. Anikina, *, E. N. Tarasova, D. S. Neznakhina, M. A. Semkina, b, N. V. Seleznevaa,
S. V. Andreeva, M. V. Ragozinaa, b, and A. V. Zinina
a Institute of Natural Sciences, Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
b Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
Correspondence to: * e-mail: maksim.anikin@urfu.ru
Received 8 July, 2021
Abstract—Crystal structure, temperature and field dependences of magnetization, high-field susceptibility, and magnetocaloric effect (MCE) of Ho1 – xYx(Co0.84Fe0.16)2 polycrystalline compounds (x = 0–1) in magnetic fields up to 90 kOe in a temperature range of 5–400 K are investigated. An analysis of temperature dependences of magnetization (σ) showed that, depending on the yttrium content (x), up to three “critical” temperatures can be simultaneously present in the studied samples: spin-reorientation (Tsr), magnetic compensation point (Tcomp), and Curie temperature (TC). The temperature dependence of the high-field susceptibility (χhf) of all samples with x < 1 has an extremum in the vicinity of 100 K, where a significant MCE is observed, associated with a sharp change in the magnetization of the rare-earth sublattice. The temperature dependences of the magnetic entropy change (ΔSm) and the adiabatic temperature change (ΔTad) have a complex shape and reflect all the above-mentioned “critical” temperatures observed at different x.
Keywords: magnetic properties, direct and inverse magnetocaloric effect, adiabatic temperature change, magnetic moment, Laves phases, Curie temperature, compensation point, spin-reorientation transition
DOI: 10.1134/S1063783422050080