The magnetic and magnetocaloric effect of (Mn0.5CO0.5)65Ge35 alloy in low magnetic field

The crystal structure and magnetocaloric effect (MCE) of water-quenched and annealed (Mn0.5Co0.5)65Ge35 alloys were studied in this paper. A CoMnGe-single phase was formed in the water-quenched alloy, and mixture phases of CoMnGe and Mn+2O in the annealed alloy. The annealed alloy has a smaller crys...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 2008-05, Vol.320 (10), p.1671-1674
Hauptverfasser:	Zhang, Enyao, Chen, Yungui, Tang, Yongbai
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Magnetocaloric effect, magnetic cooling Physics Structure of solids and liquids crystallography Structure of specific crystalline solids
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Zusammenfassung:	The crystal structure and magnetocaloric effect (MCE) of water-quenched and annealed (Mn0.5Co0.5)65Ge35 alloys were studied in this paper. A CoMnGe-single phase was formed in the water-quenched alloy, and mixture phases of CoMnGe and Mn+2O in the annealed alloy. The annealed alloy has a smaller crystal parameter than the water-quenched alloy. The Curie temperature is 275 and 298 K for the water-quenched and annealed alloys, respectively, which means that the magnetic-transition temperature in this material can be controlled by anneal. In addition, the same magnetic entropy change was found in these two alloys, even though their Curie temperatures have a significant difference.
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2008.01.023