Pressure effect on magnetic properties of gadolinium in paramagnetic state

• Main Authors: Panfilov, A.S., Grechnev, G.E., Logosha, A.V., Zhuravleva, I.P.
• Format: Article
• Language: English
• Published: Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України 2013
• Series: Физика и техника высоких давлений
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/69601

In this report we are mostly focused on refinement of the experimental dependence of the magnetic transition temperature TC on pressure under pure hydrostatic (gaseous) conditions. Unlike previously used methods, we employed a new procedure, based on the measurement of pressure effect on the dc magnetic susceptibility of Gd in the paramagnetic state at temperatures above TC. The dc paramagnetic susceptibility of Gd was measured in the temperature range of 295−365 K and under hydrostatic pressure up to 0.16 GPa, yielding values of the paramagnetic Curie temperature Θ and its pressure derivative. Also we explored a possibility to describe pressure effects on magnetism of Gd within simple mean-field approaches, which are based on ab initio electronic structure calculations. Based on the results of electronic structure calculations within the density functional theory, the experimental behavior of Θ under pressure was described in the framework of mean-field like approach.