Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

Abstract

The magnetocaloric (MC) effect-based solidstate magnetic refrigeration (MR) technology has been recognized as an alternative novel method to the presently commercialized gas compression technology. Searching for suitable candidates with promising MC performances is one of the most urgent tasks. Herein, combined experimental and theoretical investigations on the magnetic properties, magnetic phase transition, and cryogenic MC performances of GdFe 2 Si 2 have been performed. An unstable antiferromagnetic (AFM) interaction in the ground state has been confirmed in GdFe 2 Si 2 . Moreover, a huge reversible cryogenic MC effect and promising MC performances in GdFe 2 Si 2 have been observed. The maximum isothermal magnetic entropy change, temperature-averaged entropy change with 2 K lift, and refrigerant capacity for GdFe 2 Si 2 were 30.01 J kg −1 K −1 , 29.37 J kg −1 K −1 , and 328.45 J kg −1 at around 8.6 K with the magnetic change of 0-7 T, respectively. Evidently, the values of these MC parameters for the present AFM compound GdFe 2 Si 2 are superior to those of most recently reported rareearth-based MC materials, suggesting the potential application for active cryogenic MR.

Magnetothermal Effects and Critical Behavior of Rare Earth Manganese Oxides La 0.65 Ca 0.35 Mn 1-x Ni x O 3 (x=0, 0.2)

“…According to Banerjee's criterion, if the Arrott curves have a positive slope, the magnetic phase experiences a secondary phase transition. If the slope of the Arrott curves is negative or an "S" shape appears, the phase transition is primary [22,23] . Considering the illustration, it can be inferred that the primary to secondary phase transition exists for both the parent and doped samples in this set of samples. )…”

Excellent cryogenic magnetocaloric properties in heavy rare-earth based HRENiGa2 (HRE = Dy, Ho, or Er) compounds

“…It is characterized by an isothermal magnetic entropy change (ΔS iso ) and an adiabatic temperature change (ΔT ad ). By using a large variety of magnetic materials and different thermodynamic cycles, MR can operate in a very wide temperature range (from extremely low temperatures up to room temperature) [7][8][9][10][11][12][13][14][15][16][17]. In recent years, lowtemperature MR has received extensive attention due to its important applications, such as industrial gas liquefaction and storage, cryogenic space technology, and laboratory cryogenic basic research [18][19][20][21][22][23][24][25].…”

Magnetic Field Effect on the Handedness of Electrodeposited Heusler Alloy

“…The synthesis of new compounds that allow the modulation of the magnetic field is a hot topic [3,4]. Fairly elegant and interesting papers are present in the literature which aim to assess the effect of a magnetic field on both bulk and interfacial properties in electrochemical systems.…”