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Original Articles

Magnetocaloric properties of Nd5Si1.45Ge2.55 compound under high hydrostatic pressure

, , , &
Pages 495-498 | Received 31 Aug 2006, Published online: 02 May 2007
 

Abstract

The magnetic and magnetocaloric properties of Nd5Si1.45Ge2.55 compound has been studied under high hydrostatic pressure up to 0.9 GPa. At ambient pressure, the Curie temperature (T C) and magnetocaloric effect (MCE) give values T C=58.1 K and−Δ S M=4.9 J/kg K. Both T C and MCE weakly increase with pressure. Using the value of compressibility (1.7*10−2 GPa−1), we showed that the values of dT C/d V and d|−Δ S M|/d V obtained from experiments under high pressure are sufficiently lower than those estimated from the x-dependence of the lattice cell volume of Nd5(Si x Ge1−x )4 compounds. It indicated that the changes of magnetocaloric properties cannot be explained only by volume effect.

Acknowledgements

The financial support of the Grant Agency of the Czech Republic (Grant no. 106/06/0368) is acknowledged.

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