Measurements of magnetocaloric effect in LaFe11.14Co0.66Si1.2-xAlx (x = 0.1, 0.2, 0.3) alloys

Abstract

In the present work, phase constitution and thermomagnetic properties of LaFe11.14Co0.66Si1.2-xAlx (where x = 0.1, 0.2, 0.3) alloys were investigated. Ingot samples were obtained by arc-melting under the low pressure of Ar atmosphere. Subsequently samples were annealed at 1323 K for 15 days. X-ray diffraction of all samples revealed coexistence of two crystalline phases dominant La(Fe,Si)13-type and minor bcc α-Fe. Furthermore, the magnetic measurements at various temperatures allowed to study the Curie temperature, magnetic entropy changes and relative cooling power.