title: (Lu0.8Ce0.2)2Fe17 single crystal under hydrostatic and 'negative' pressure induced by hydrogenation.
abstract: An experimental study of correlations between the magnetovolume effects and the type of magnetic ordering in the Lu(2)Fe(17)-based intermetallics is shown for the example of variation of the interatomic distances by means of substitution of Ce for Lu, hydrogenation and subsequent high-pressure investigation of both the initial (Lu(0.8)Ce(0.2))(2)Fe(17) and a hydride (Lu(0.8)Ce(0.2))(2)Fe(17)H(0.4) single-crystalline compounds. The magnetization study was carried out under hydrostatic pressures of up to ∼ 0.8 GPa. Hydrogenation is found to totally suppress the antiferromagnetic order of (Lu(0.8)Ce(0.2))(2)Fe(17) by favoring domination of the ferromagnetic interactions which increases the magnetic ordering temperature from 247 to 300 K. The application of pressure decreases the Curie temperature and induces the non-collinearity of the magnetic moments in (Lu(0.8)Ce(0.2))(2)Fe(17)H(0.4), confirming the strong influence of hydrogenation on exchange coupling.
authors.affiliation: Institute of Physics ASCR, Prague, Czech Republic. tereshina@imr.tohoku.ac.jp
authors.forename: E A
authors.initials: EA
authors.lastname: Tereshina
authors.forename: A V
authors.initials: AV
authors.lastname: Andreev
authors.forename: J
authors.initials: J
authors.lastname: Kamarád
authors.forename: O
authors.initials: O
authors.lastname: Isnard
authors.forename: K
authors.initials: K
authors.lastname: Watanabe