Anikin M.S.1,2, Tarasov E.N.1,2, Zinin A.V.1,2, Kudrevatykh N.V.1,2, Neznakhin D.S.1,2, Semkin M.A.1,2,3, Knyazev M.I.1,2, Selezneva N.V.1,2, Andreev S.V.1,2
1Institute of Natural Sciences &
2Mathematics, Ural Federal University, Ekaterinburg, Russia
3Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
Email: maksim.anikin@urfu.ru
Выставление онлайн: 6 декабря 2023 г.
To clarify the nature of the anomalously high magnetocaloric effect at low temperatures in the RMe2 Laves type phases with "non-magnetic" rare-earth ions (R=Y or Lu) and 3d elements of the Fe group (Me=Fe, Co), the Y(Co1-xFe_x)2 (x=0.12-0.20) and Lu(Co0.84Fe0.16)2 compositions have been synthesized and their magnetic and magnetocaloric properties were investigated (isothermal magnetic entropy change Delta Sm and adiabatic temperature change Delta Tad). It has been established that the iron concentration increases and/or Y by Lu replacement with unchanged Co : Fe ratio gives rise in the energy of the d-d exchange interaction, which is followed by an increase in the Curie temperature value as well as by the low-temperature anomaly shift on the Delta S_m(T) dependence to a higher temperatures range. Keywords: magnetocaloric effect, adiabatic temperature change, magnetic moments, Laves phase, Curie temperature, mictomagnetism.
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