Structural, magnetic and magnetocaloric properties of NdPrFe.sub.14./sub.B and its hydrides

0520916 - FZÚ 2020 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Tereshina, I. - Kaminskaya, T. - Ivanov, L. - Politova, G. - Drulis, H. - Gorbunov, D. - Paukov, M. - Tereshina-Chitrova, Evgenia - Andreev, Alexander V.
Structural, magnetic and magnetocaloric properties of NdPrFe₁₄B and its hydrides.
Journal of Physics: Conference Series. Vol. 1389. Bristol: IOP Publishing Ltd., 2019, s. 1-7, č. článku 012094. ISSN 1742-6588.
[Euro-Asian Symposium on Trends in Magnetism /7./, EASTMAG 2019. Ekaterinburg (RU), 09.09.2019-13.09.2019]
Grant CEP: GA ČR(CZ) GA19-00925S
Institucionální podpora: RVO:68378271
Klíčová slova: R-Fe intermetallics * hydrides * magnetic anisotropy * phase diagram.
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

A systematic study of the influence of interstitial hydrogen on the structure, morphology of surface, magnetic and magnetothermal properties in multicomponent NdPrFe14BHx (x = 0, 2.7, 4.3) are reported. Partial substitution of Pr for Nd allows a decrease of the spin-reorientation transition temperature from 135 K for Nd2Fe14B to 73 K for NdPrFe14B. Unit cell volume increases upon hydrogen absorption. Hydrogenation has a significant effect on magnetic properties of a multicomponent alloy NdPrFe14B: Curie temperature and saturation magnetization increase, while temperature of spin-reorientation transition decreases. The magnetocaloric effect in the range of SRT also decreases significantly. We analyzed magnetic properties of NdPrFe14BHx and compare them with that of Nd2Fe14BHx. Magnetic phase diagrams are constructed.

Trvalý link: http://hdl.handle.net/11104/0305592