Magnetocaloric effect in (La, R)2/3Ca1/3MnO3 (R = Gd, Dy, Tb, Ce)

Substitution effects on the magnetocaloric effect (MCE) in (La1-x)2/3Ca1/3MnO3 (R = Gd, Dy, Tb, Ce) were studied. It was found that the Curie temperature TC decreases with increasing x, and that the maximum magnetic entropy change *DSM always occurs at x = 0.1 for all rare-earth dopants. The maximum...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 2003-02, Vol.257 (2-3), p.254-257
Hauptverfasser:	Chen, Haiying, Lin, Chin, Dai, Daosheng
Format:	Artikel
Sprache:	eng
Schlagworte:	Colossal magnetoresistance Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Magnetization curves, hysteresis, Barkhausen and related effects Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Magnetocaloric effect, magnetic cooling Magnetotransport phenomena, materials for magnetotransport Physics
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Zusammenfassung:	Substitution effects on the magnetocaloric effect (MCE) in (La1-x)2/3Ca1/3MnO3 (R = Gd, Dy, Tb, Ce) were studied. It was found that the Curie temperature TC decreases with increasing x, and that the maximum magnetic entropy change DSM always occurs at x = 0.1 for all rare-earth dopants. The maximum magnetic entropy change =DSM= for a 15 kOe magnetic field change is 6.06 J/kg K for (La0.9Dy0.1)2/3Ca1/3MnO3 around its Curie temperature (176 K).
ISSN:	0304-8853
DOI:	10.1016/s0304-8853(02)01176-9