Pressure effect on magnetic properties of gadolinium in paramagnetic state

• Дата: 2013
• Автори: Panfilov, A.S., Grechnev, G.E., Logosha, A.V., Zhuravleva, I.P.
• Формат: Стаття
• Мова: English
• Опубліковано: Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України 2013
• Назва видання: Физика и техника высоких давлений
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/69601
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Pressure effect on magnetic properties of gadolinium in paramagnetic state / A.S. Panfilov, G.E. Grechnev, A.V. Logosha, I.P. Zhuravleva // Физика и техника высоких давлений. — 2013. — Т. 23, № 1. — С. 5-12. — Бібліогр.: 22 назв. — англ.

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.