Title :
Structural and magneto-caloric properties of MnFeP1−xSix compounds prepared by spark plasma sintering
Author :
Yue, M. ; Xu, M. ; Zhang, H. ; Zhang, D. ; Liu, D. ; Altounian, Z.
Author_Institution :
Coll. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
This study investigates the effects of silicon content on the structural and magnetic properties of MnFeP1-xSix compounds prepared by mechanical alloying and spark plasma sintering. The crystal structures and lattice parameters of the samples are examined by X-ray diffraction using the Rietveld refinement method. Magnetic measurements are performed with a vibrating sample magnetometer. Temperature dependence of magnetization is discussed and is measured at 0.05 T field. It is observed that the samples undergo ferromagnetic-paramagnetic first-order transition near the Curie temperature which induces large magnetic entropy changes.
Keywords :
Curie temperature; X-ray diffraction; crystal structure; entropy; ferromagnetic materials; ferromagnetic-paramagnetic transitions; iron alloys; lattice constants; magnetisation; magnetocaloric effects; magnetometry; manganese alloys; mechanical alloying; paramagnetic materials; phosphorus alloys; plasma materials processing; silicon alloys; sintering; Curie temperature; MnFeP1-xSix; Rietveld refinement; X-ray diffraction; crystal structures; ferromagnetic-paramagnetic first-order transition; lattice parameters; magnetic entropy; magnetic flux density 0.05 T; magnetic measurements; magnetization; magnetocaloric properties; mechanical alloying; spark plasma sintering; structural properties; temperature dependence; vibrating sample magnetometry; Compounds; Magnetic hysteresis; Magnetic properties; Magnetometers; Powders; Silicon; X-ray scattering;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157654
