DocumentCode
1190344
Title
Magnetic-entropy change in Mn1.1Fe0.9P1-xGex compounds
Author
Dagula, W. ; Tegus, O. ; Fuquan, B. ; Zhang, L. ; Si, P.Z. ; Zhang, M. ; Zhang, W.S. ; Brück, E. ; de Boer, F.R. ; Buschow, K.H.J.
Author_Institution
Van der Waals-Zeeman Inst., Amsterdam Univ., Netherlands
Volume
41
Issue
10
fYear
2005
Firstpage
2778
Lastpage
2780
Abstract
The magnetic and magnetocaloric properties of Mn1.1Fe0.9p1-xGex compounds with x=0.20,0.22,0.23,0.26, and 0.30 have been investigated. In the composition range x from 0.20 to 0.30, the compounds crystallize in the Fe2P-type hexagonal structure. The Curie temperature of the compounds strongly increases with increasing Ge contents. A history dependence of the magnetic phase transition is observed in this compound system. The optimum composition range and the temperature range of the Mn1.1 Fe0.9P1-xGex compounds for magnetic refrigeration applications have been determined. In the composition range x from 0.20 to 0.23, the compounds exhibit large magnetic-entropy change in a low magnetic field.
Keywords
Curie temperature; ferromagnetic materials; iron compounds; magnetic hysteresis; magnetic transitions; magnetocaloric effects; manganese compounds; phosphorus compounds; Curie temperature; Mn1.1Fe0.9P0.70Ge0.30; Mn1.1Fe0.9P0.74Ge0.26; Mn1.1Fe0.9P0.77Ge0.23; Mn1.1Fe0.9P0.78Ge0.22; Mn1.1Fe0.9P0.80Ge0.20; ferromagnetic materials; magnetic hysteresis; magnetic phase transition; magnetic properties; magnetic-entropy change in Mn1.1Fe0.9P1-xGex compounds; magnetocaloric effects; magnetocaloric properties; Crystallization; Iron; Magnetic materials; Magnetic properties; Magnetosphere; Powders; Refrigeration; Refrigerators; Temperature; X-ray scattering; Ferromagnetic materials; magnetic hysteresis; magnetic transitions;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2005.854774
Filename
1519119
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