Magnetic properties and magnetostriction of R.sub.2./sub.Fe.sub.17./sub.H.sub.3±x./sub. (R = Tb, Dy) hydrides

0456012 - FZÚ 2016 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Tereshina, I. S. - Tereshina, Evgeniya - Doerr, M. - Pelevin, I.A. - Telegina, I.V. - Smarzhevskaya, A.I. - Drulis, H.
Magnetic properties and magnetostriction of R₂Fe₁₇H_3±x (R = Tb, Dy) hydrides.
Solid State Phenomena. Vols. 233-234. Pfaffikon: Trans Tech Publications Ltd, 2015 - (Perov, N.; Semisalova, A.), s. 259-262. ISSN 1662-9779.
[Moscow International Symposium on Magnetism /6./ MISM 2014. Moskva (RU), 29.06.2014-03.07.2014]
Grant CEP: GA ČR GAP204/12/0150; GA MŠMT(CZ) LM2011026
Institucionální podpora: RVO:68378271
Klíčová slova: hydrides * magnetic anisotropy * magnetostriction * rare-earth compounds
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

The magnetic anisotropy (MA) of trihydrides of single-crystalline rare-earth (R) intermetallics R2Fe17H3±x (R = Tb and Dy) with small deviations in the hydrogen concentration (x = 0 – 0.4) was investigated via the magnetic and magnetoelastic measurements in a wide temperature region. The easy-axis MA of Tb2Fe17H3±x is preserved in the entire range of magnetically ordered state while an “easy-cone – easy-plane” transition takes place in Dy2Fe17H3±x above ambient temperatures. The trihydrides demonstrate a significant decrease of magnetic anisotropy as the temperature increases. The temperature variation of thermal expansion of Dy2Fe17H3 displays anomalies in the vicinity of a spin-reorientation transition. The longitudinal magnetostriction λ||(T) of the same compound changes its sign at 340 K. The compounds studied can find specific applications in practice.
Trvalý link: http://hdl.handle.net/11104/0256593