Magnetocaloric effect in the metamagnet ErRhSi compound

Abstract

The magnetocaloric effect is observed in the 1: 1: 1 compound ErRhSi, which is a metamagnet is reported in this paper. ErRhSi crystallizes in the orthorhombic space group Pnma, adopting the TiNiSi structure type, with lattice parameters a(angstrom) = 6.7903(5), b(angstrom) = 4.1881(3), and c(angstrom) = 7.3847(4). Our magnetic measurements confirm an antiferromagnetic phase transition at T-N approximate to 8.5 K, also supported by the specific heat measurement. Crystal field effects of Er3+ are suggested by the inverse magnetic susceptibility data which do not conform to an ideal Curie-Weiss behaviour and also by the total entropy that attains Rln (2) at T-N. Although the magnetic hysteresis indicates ErRhSi to be a soft magnet, several clear metamagnetic features are observed at 2K. Magnetic entropy change Delta S-M = -8.7 J/kg-K is observed at about 9K with the application of 5 T magnetic field. The corresponding adiabatic temperature change Delta T-ad is about 4K. Large magnetocaloric effects suggest that this material is suitable for the low temperature magnetic refrigeration. Published by AIP Publishing

Effect of Electronic Correlations on the Electronic Structure, Magnetic and Optical Properties of the Ternary RCuGe Compounds with R = Tb, Dy, Ho, Er

“…In a magnetic transition induced by field, these features are observed accompanied by changes in volume or symmetry of crystal lattice [18,21]. Recently, many new RTX ternary intermetallics have been synthesized and actively investigated for different d metals as T [22][23][24][25][26][27], as well as usual 3d metals in the second position T in RTX [28][29][30][31][32]. The nontrivial behavior of magnetic and transport properties is found experimentally near the magnetic transition temperatures that makes RTX promising for magnetic refrigeration and other applications [33].…”