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Two single-phased aluminide RE NiAl 2 ( RE = Ho and Er) compounds have been synthesized by an arc-melting method. The magnetic properties and magnetocaloric effect (MCE) of HoNiAl 2 and ErNiAl 2 have been studied by magnetization measurements. A second-order paramagnetic (PM) to ferromagnetic (FM) phase transition together with a considerable reversible MCE were observed around the Curie temperature T C ∼7.5 K and 5.0 K for HoNiAl 2 and ErNiAl 2 , respectively. Under the magnetic field change (Δ H ) of 0–5 T, the maximal values of magnetic entropy change, refrigerant capacity and relative cooling power are 14.0 J/kg K, 171 J/kg, 213 J/kg for HoNiAl 2 and 21.2 J/kg K, 267 J/kg, 357 J/kg for ErNiAl 2 , respectively. [ABSTRACT FROM AUTHOR]

In this study, two Mo 2 FeB 2 -type multiple rare-earth-containing MRE 2 Cu 2 In (MRE = Dy 1/3 Ho 1/3 Er 1/3 and Ho 1/3 Er 1/3 Tm 1/3 ; space group P 4/ mbm , No. 127) compounds are prepared via arc-melting method and systematically determined regarding their structural and magnetic properties, magnetic phase transition (MPT), and magnetocaloric (MC) performances. They undergo typical second-order MPT at low temperatures. The MC effect and MC performances of the present MRE 2 Cu 2 In compounds at low temperatures are assessed using magnetic entropy changes, refrigerant capacity, and temperature-averaged entropy changes. The values of these parameters are comparable to most updated candidate materials for low-temperature magnetic cooling, making the present MRE 2 Cu 2 In compounds considerable for practical applications. • The MRE 2 Cu 2 In (MRE = Dy 1/3 Ho 1/3 Er 1/3 and Ho 1/3 Er 1/3 Tm 1/3) compounds are fabricated. • The structural, magnetic, MPT and MC properties in MRE 2 Cu 2 In were studied. • These MRE 2 Cu 2 In compounds are considerable for cryogenic magnetic refrigeration. [ABSTRACT FROM AUTHOR]

In this paper, we reported on the magnetic properties and magneto-caloric effect (MCE) of the aluminium compounds Dy 2 CuAl 3 and Tm 2 CuAl 3 based on the magnetization and isothermal magnetization of various temperature measurements. Both compounds obey magnetic phase transition from a paramagnetic (PM) to ferromagnetic (FM) state (second order) around the Curie temperatures of T C  ∼ 24.5 and 4.7 K together with a considerable reversible MCE for Dy 2 CuAl 3 and Tm 2 CuAl 3 , respectively. The magnetic entropy change (-Δ S M ) and the relative cooling power ( RCP ) were estimated and discussed in terms of MCE. Maximum values of -Δ S M are 6.68 and 11.33 J/kg K for Dy 2 CuAl 3 and Tm 2 CuAl 3 , respectively, for a change in field of 0–5 T. Correspondingly, the values of RCP are 364 J/kg and 216 J/kg. [ABSTRACT FROM AUTHOR]