Changes in magnetic state of Y.sub.2./sub.(Fe,Mn).sub.17./sub.-H systems: Regularities and potentialities

0434618 - FZÚ 2015 RIV NL eng J - Journal Article
Iwasieczko, W. - Pankratov, N.Yu. - Tereshina, Evgeniya - Nikitin, S. A. - Tereshina, I. S. - Skokov, K. P. - Karpenkov, A.Yu. - Grechishkin, R.M. - Drulis, H.
Changes in magnetic state of Y₂(Fe,Mn)₁₇-H systems: Regularities and potentialities.
Journal of Alloys and Compounds. Roč. 587, FEB (2014), s. 739-746. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR GAP204/12/0150
Institutional support: RVO:68378271
Keywords : magnetic transitions * hydrides * exchange interactions
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.999, year: 2014

A systematic study is made of magnetic properties of hydrogenated Y2Fe17-xMnxHy intermetallic alloys (0≤x≤8 and 0≤y≤4.4 at.H/f) and the exchange interaction parameters of these compounds are estimated. It is found that hydrogen atoms enhance the ferromagnetic interactions. The decrease of the Curie temperature observed in both hydrides and parent alloys with substitution of manganese for iron gives an indication of the reinforcement of negative exchange interactions. As a result the magnetic order of the compounds under study is subject to change at high (x>6) manganese concentration. The transformation of magnetic state in the Y2(Fe,Mn)17-H system is explained on the basis of molecular field theory connecting the Curie temperatures with the value and sign of exchange interaction integrals for magnetoactive atoms: iron and manganese.
Permanent Link: http://hdl.handle.net/11104/0238591