Effect of hydrogenation on magnetic ordering temperature in Lu2(Fe,Si)17 compounds

Magnetic and structural properties of the Lu2Fe17Hy hydrides

“…The magnetic parameters of the studied Lu 2 Fe 17 H y hydrides are very similar to those published in the paper [8], but they are different from that reported in the paper [9], where the hydride sample with y = 0.8 is already a ferromagnet. Apparently, also in this case the more or less distorted crystal structure of the initial Lu 2 Fe 17 compounds prepared by different authors [1,6,[8][9][10] is probable responsible for the reported different magnetic parameters for their Lu 2 Fe 17 H y hydride samples.…”

“…2). Ferromagnetism strengthening in the Lu 2 Fe 17 H y hydrides for y = 0-1.77 is analogous to those observed in the other R 2 Fe 17 H y systems and was interpreted as due to the increase of the 3d interatomic distances [6][7][8][9]. Spontaneous magnetization of the Lu 2 Fe 17 H y hydrides is virtually independent of hydrogen content.…”

“…Apparently, also in this case the more or less distorted crystal structure of the initial Lu 2 Fe 17 compounds prepared by different authors [1,6,[8][9][10] is probable responsible for the reported different magnetic parameters for their Lu 2 Fe 17 H y hydride samples.…”

“…Insertion of hydrogen or nitrogen and carbon to the any metallic alloy lattice usually increases interatomic distances. When introduced they did the same in the R 2 Fe 17 compounds, and strengthening of positive exchange interactions between iron atoms are observed [6][7][8][9].…”

Magnetism of Lu2Fe17: The effects of Ru substitution, hydrogenation and external pressure

“…The expansion is anisotropic, a/a is twice larger than c/c. From our previous experience with preparation of the single-crystalline hydride of the Lu 2 Fe 17 -based compounds [17,18], we knew that it is impossible to prevent a powdering of the sample when the hydrogen content y in the R 2 Fe 17−x T x H y compounds exceeds 1 H at./f.u. (i.e.…”