Thermal expansion and magnetostriction in Pr(n+2)(n+1)Nin(n-1)+2Sin(n+1) compounds

Jiles, David, Song, S H, Snyder, John Evan, Pecharsky, V K, Lograsso, T. K., Wu, D, Pecharsky, A. O., Mudryk, Ya, Dennis, K. W, and McCallum, R. W. 2006. Thermal expansion and magnetostriction in Pr(n+2)(n+1)Nin(n-1)+2Sin(n+1) compounds. Journal of Magnetism and Magnetic Materials 299 (2) , pp. 288-299. 10.1016/j.jmmm.2005.04.015

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Abstract

Thermal expansion and magnetostriction of members of a homologous series of compounds based on the alloy series Pr(n+2)(n+1)Nin(n?1)+2Sin(n+1) have been measured. The crystal structures of these compounds are closely interrelated because they form trigonal prismatic columns in which the number of trigonal prisms that form the base of the trigonal columns is determined by the value of n in the chemical formula. Two compositions were investigated, Pr5Ni2Si3 and Pr15Ni7Si10, corresponding to n=3 and n=4, respectively. The results were analyzed and used to determine the location of magnetic phase transitions by calculating the magnetic contribution to thermal expansion using the Gruneisen–Debye theory. This allowed more precise determination of the magnetic transition temperatures than could be achieved using the total thermal expansion. The results show two phase transitions in each material, one corresponding to the Curie temperature and the other at a lower temperature exhibiting characteristics of a spin reorientation transition.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Uncontrolled Keywords:	Thermal expansion; Magnetostriction; Pr5Ni2Si3 compound; Pr15Ni7Si10 compound
ISSN:	03048853
Last Modified:	04 Jun 2017 01:43
URI:	https://orca.cardiff.ac.uk/id/eprint/1932

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