Magnetocaloric and Hopkinson effects in slowly and rapidly cooled Gd sub(7) Pd sub(3)

• Published in: International journal of materials research Vol. 107; no. 1; pp. 03 - 12
• Main Authors: Talik, Ewa, Guzik, Adam, Oboz, Monika, Zajdel, Pawel, Ziolkowski, Grzegorz
• Format: Journal Article
• Language: English
• Published: 01-01-2016
• Subjects: Diffraction; Ferromagnetism; Grain size; Induction coils; Intermetallic compounds; Intermetallics; Magnetic properties; Molds
• ISSN: 1862-5282; 2195-8556
• DOI: 10.3139/146.111318

Gd sub(7) Pd sub(3) intermetallic compound was prepared as slowly cooled polycrystal and rapidly cooled (rc) casts. The slowly cooled polycrystalline samples were obtained by melting in an induction coil. The rc-cast Gd sub(7) Pd sub(3) sample was obtained by means of a mould casting technique. The samples were characterized by means of X-ray diffraction, SQUID magnetometry and scanning electron microscopy in order to elucidate the Hopkinson effect and magnetocaloric properties in relation to the technological aspects. The investigated ferromagnetic system is sensitive to grain size. The magnetocaloric and Hopkinson effect decreases with the decrease of the grain size. The results were compared to the data of single crystal obtained by the Czochralski method from a levitating melt.