Magnetocaloric Effects of La_0.8R_0.2(Fe_0.88Si_0.12)₁₃ (R = Y, Ho and Yb) Compounds in Low Applied Magnetic Field

Abstract

Low field magneto-caloric response is important for application. We present here the results of a study on crystal structure and magnetic properties of rare-earth doped compounds La 0.8 R 0.2 (Fe 0.88 Si 0.12 ) 13 (R = Y, Ho and Yb). All samples were prepared by using arc-melting method in argon atmosphere. The lattices revealed by X-ray diffraction method show a well-defined NaZn 13 -type structure with small amounts of ¡-Fe phase. The dependence of magnetization on temperature M(T) and on field M(H) curves were recorded. The magnetic entropy change ¹¦S m and cooling powers (RCP) of compounds were estimated. The results show considerable better magneto-caloric responses of doped compounds in comparison with that of the undoped compound.

Recent Progress in Nanostructured Functional Materials and Their Applications II

“…Results suggest that the spin reorientation temperature increases from 255 to 383 K at x = 0 and 0.15, respectively, while it is independent from Sn concentration, y. The last paper 174) in this magnetic materials category, crystal structures of rare-earth doped compounds La 0.8 R 0.2 (Fe 0.88 Si 0.12 ) 13 (R = Y, Ho and Yb) are studied by the X-ray diffraction method and their magnetic properties are observed, which suggest that the Currie temperature increases with increasing of filling 4f states.…”