Articles you may be interested inEnhanced mechanical properties and large magnetocaloric effects in bonded La(Fe, Si)13-based magnetic refrigeration materials Appl. Phys. Lett. Effect of carbon on magnetocaloric effect of LaFe11.6Si1.4 compounds and on the thermal stability of its hydrides J. Appl. Phys. 111, 07A927 (2012); 10.1063/1.3675985 Reduction of hysteresis loss and large magnetocaloric effect in the C-and H-doped La(Fe, Si)13 compounds around room temperature J. Appl. Phys. 111, 07A909 (2012); 10.1063/1.3670608The hydrogen absorption properties and magnetocaloric effect of La0.8Ce0.2(Fe1−xMnx)11.5Si1.5HyThe mechanical properties and magnetocaloric effect (MCE) of bonded La(Fe, Si) 13 hydrides have been studied in detail. The mechanical strength increases with increasing the grade of epoxy resin from E-20 to E-51. This occurs because more pores and boundaries are filled with high grade resin since high epoxide content increases the degree of crosslinking and reduces the viscosity and shrinkage of resin. The compressive strength reaches 162 MPa for the bonded LaFe 11.7 Si 1.3 C 0.2 H 1.8 with 3 wt. % E-51, which is 35% higher than that of bulk LaFe 11.7 Si 1.3 C 0.2 compound (120 MPa). The mass DS M values remain almost same in bonded hydrides and are in a good agreement with the theoretical value. The maximum volumetric DS M values are 61.8, 58.0, and 54.7 mJ/cm 3 K for bonded hydrides with epoxy resins E-20, E-44, and E-51, respectively, much higher than those of some magnetocaloric materials in same temperature range. The improved mechanical properties and large MCE indicate that bonded LaFe 11.7 Si 1.3 C 0.2 H 1.8 is a promising material for room temperature magnetic refrigeration. V C 2015 AIP Publishing LLC. [http://dx.

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Magnetic properties and magnetocaloric effect (MCE) of intermetallic HoNiSi compound have been investigated systematically. It is found that HoNiSi exhibits antiferromagnetic (AFM) state below the Néel temperature TN of 3.8 K, which is quite close to the liquid helium temperature (4 K). A giant MCE without hysteresis loss is observed in HoNiSi, which is related to the field-induced first-order metamagnetic transition from AFM to ferromagnetic states. For a magnetic field change of 2 T, the maximum values of magnetic entropy change (−ΔSM) and adiabatic temperature change (ΔTad) are 17.5 J/kg K and 4.5 K, respectively. In addition, HoNiSi presents both large values of positive and negative ΔSM for the low field changes, i.e., the maximum −ΔSM values are 9.2 J/kg K around TN and −7.2 J/kg K below TN for the field changes of 1 and 0.5 T, respectively. A universal curve of ΔSM is successfully constructed by using phenomenological procedure, proving the applicability of universal ΔSM curve for AFM materials. The giant reversible MCE for relatively low magnetic field change makes HoNiSi attractive candidate for magnetic refrigerant materials around liquid helium temperature.

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