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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.73: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

structure and magnetocaloric effect of Gd-based compound — •Guangcun Shan^1,2, JiLiang ZHANG¹, and Chan-Hung SHEK¹ — ¹Department of Physics and Materials Science, City University of Hong Kong, Hong Kong — ²Max-Planck-Institut für Chemische Physik fester Stoffe

Gd-based compound was synthesized successfully, and the compound shows good soft magnetic behavior at room temperature with a Curie temperature ~ 350 K. The compound exhibits non Curie-Weiss behavior in a large temperature range above Curie temperature, and slightly enhanced Gd moment at low temperature. The elevated Curie temperature and slightly enhanced Gd magnetic moment were interpreted using Ruderman-Kittel-Kasuya-Yosida model, based on measured electronic structure and density functional theory (DFT) simulation results. The magnetocaloric effect was also measured in terms of the maximum magnetic entropy change of -4.3 J*Kg-1K-1 at 50 kOe and -2.3 J*Kg-1K-1 at 20 kOe.