Ni–Gd–Al metallic glasses with large magnetocaloric effect

Magnetocaloric Effect in Uncoated Gd55Al20Co25 Amorphous Wires

“…At the very low temperatures such as hydrogen and helium liquefaction range or even mK range, paramagnetic salts i.e. Dy 3 Ga 3 O 12 and Gd 3 Ga 3 O 12 have been used as refrigerants in MR [2] . Moreover, the series of refrigerants with first-order magnetic transition (FOMT) such as La(Fe,Si) [3] , Gd(GeSi) [4] and MnFePAs [5] alloys and with second-order magnetic transition (SOMT) e.g.…”

Magnetocaloric effect and critical behavior in melt-extracted Gd60Co15Al25microwires

“…The as-cast microwires undergo a secondorder paramagnetic to ferromagnetic (PM-FM) transition at $100 K. Large values of the magnetic entropy change (ÀDS M $9.73 J kg À1 K À1 ) and the refrigerant capacity (RC $732 J kg 1 Introduction Magnetic refrigeration (MR) based on the magnetocaloric effect (MCE) of magnetic refrigerant materials with a first-order magnetic transition (FOMT) or a second-order magnetic transition (SOMT) has attracted growing interest in the scientific community, due to its advantages (e.g., high-cooling efficiency, environmental friendliness, low noise, and compactness) over conventional gas compression-based cooling techniques [1]. Beside Gd, one of the best refrigerant candidates for sub-room temperature magnetic refrigeration [2], a large number of alloys including GdSiGe [3], LaFeSi [4], and MnFePAs [5] exhibiting giant MCEs have been developed for roomtemperature MR, and some of them have also been exploited in low-temperature MR [6]. It has been reported that the larger magnetic enetropy change (DS M ) is observed in a FOMT material but is concentrated in a narrower temperature range, as compared to a SOMT material that shows the smaller magnetic entropy change over a broader temperature range [7].…”

Structural chemistry and magnetic properties of R11M4In6 (R=Gd, Tb, Dy, Ho, Er, Y; M=Si, Ge) compounds

“…The maximum magnetic entropy change of 16.5 J/kg K is higher than the one reported for Tm 11 Ge 8 In 2 [13], Gd 3 NiSi 2 [26], Gd 3 CoSi 2 [27], Gd 6 Co 4.85 [28] but lower when compared to 36 J/kg K found for Gd 5 Si 2 Ge 2 [29] or 24.4 J/kg K for LaFe 11.6 Si 1.4 [30]. A large magnetocaloric effect is observed also in NieGdeAl metallic glasses [31].…”