Investigations in MnAs1−xSbx: Experimental validation of a new magnetocaloric composite

Luz, M. S. da; Campos, Adriana de; Coelho, A. A.; Cardoso, Lisandro Pavie; Santos, A.O. dos; Gama, S.

doi:10.1016/j.jmmm.2014.08.069

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…In 1997, Pecharsky and Gschneidner [6] observed Gd 5 Si 2 Ge 2 with a first-order phase transition having an MCE of about 18 J/(kg·K) under the magnetic field change of 0–5 T, which is larger than that of pure Gd (~10 J/(kg·K)) under the same condition. Fengxia Hu et al [7] found that LaFe 13− x Si x had a large MCE of about 19.7 J/(kg·K) at 208 K for a field change of 0–5 T. In addition to the discoveries mentioned above, materials such as MnAs 1− x Sb x [8,9], Ni–Mn–Sn [10,11,12], and La 1− x Ca x MnO 3 [13,14,15] have also been found to have good room temperature magnetic refrigeration performances. These achievements are sufficient to show that room temperature magnetic refrigeration has good development prospects, especially the pure Gd, which is now used as a benchmark for magnetic refrigeration materials.…”

Section: Introductionmentioning

confidence: 99%

Tunable Magnetocaloric Properties of Gd-Based Alloys by Adding Tb and Doping Fe Elements

Qian

et al. 2019

Materials

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In this paper, the magnetocaloric properties of Gd1−xTbx alloys were studied and the optimum composition was determined to be Gd0.73Tb0.27. On the basis of Gd0.73Tb0.27, the influence of different Fe-doping content was discussed and the effect of heat treatment was also investigated. The adiabatic temperature change (ΔTad) obtained by the direct measurement method (under a low magnetic field of 1.2 T) and specific heat capacity calculation method (indirect measurement) was used to characterize the magnetocaloric properties of Gd1−xTbx (x = 0~0.4) and (Gd0.73Tb0.27)1−yFey (y = 0~0.15), and the isothermal magnetic entropy (ΔSM) was also used as a reference parameter for evaluating the magnetocaloric properties of samples together with ΔTad. In Gd1−xTbx alloys, the Curie temperature (Tc) decreased from 293 K (x = 0) to 257 K (x = 0.4) with increasing Tb content, and the Gd0.73Tb0.27 alloy obtained the best adiabatic temperature change, which was ~3.5 K in a magnetic field up to 1.2 T (Tc = 276 K). When the doping content of Fe increased from y = 0 to y = 0.15, the Tc of (Gd0.73Tb0.27)1−yFey (y = 0~0.15) alloys increased significantly from 276 K (y = 0) to 281 K (y = 0.15), and a good magnetocaloric effect was maintained. The annealing of alloys (Gd0.73Tb0.27)1−yFey (y = 0~0.15) at 1073 K for 10 h resulted in an average increase of 0.3 K in the maximum adiabatic temperature change and a slight increase in Tc. This study is of great significance for the study of magnetic refrigeration materials with adjustable Curie temperature in a low magnetic field.

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Section: Introductionmentioning

confidence: 99%

Tunable Magnetocaloric Properties of Gd-Based Alloys by Adding Tb and Doping Fe Elements

Qian

et al. 2019

Materials

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“…This breakthrough rapidly facilitated the development of magnetic refrigeration technique. Up to date, several classes of magnetocaloric materials have been investigated, including Gd 5 (Si,Ge) 4 [4e7], La(Fe,Si) 13 [8,9], MnAs [10e13] and Heusler NieMn based materials [14e18]. Among them, Heusler NieMn based materials without rare-earth or toxic elements (such as As) were considered to be more suitable for practical applications.…”

Section: Introductionmentioning

confidence: 99%