Neutron diffraction study of Ho5YFe23 and Ho5YFe23D16 deuteride

High magnetic field properties of yttrium-substituted Ho6Fe23 alloys and deuterides

“…3 the temperature evolution up to 97 K of some parallel isotherms of the deuteride Ho 5 YFe 23 D 16 . A pure Clark and Callen behavior is confirmed; it is characterized by M = H / N Ho-Fe ͑dash-dot line͒ 5 This behavior suggests that this last deuteride behaves like a pure ferrimagnetic compound on the one hand; on the other hand, neutron diffraction data and molecular field fitting indicate a canting angle of ϳ6°. Therefore, the debate about the origin of this difference remains open and further studies should be performed to confirm this suggestion.…”

Crystal Chemistry of RE6MgxCd23–xPb [0.6(1) ≤ x ≤ 3.2(1); RE = La and Ce]. New Mixed‐Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

“…Often, however, as in Er 5 Fe 6 Sn 18 the chemical formula is indicative of varying degree of occupational disorder. In many cases, the disorder seems to be related to chemical similarities between elements: rare‐earth metals, which predominantly take position 24 e tend to mix with alike species,, whereas various d‐block metals tend to share positions within the Mn 23 sub‐structure , . In the latter case, the four Mn 23 positions need not experience the same degree of mixed occupancy, and a more ordered distribution may be favored at certain sites due to electronic, magnetic, and/or volume effects .…”

“…The large, highly symmetric cubic unit cell of Th 6 Mn 23 contains one Th site (Wyckoff position 24 e ) and four Mn sites (2 × 32 f , 24 d , and 4 a ). Since its discovery, the chemistry within this structure type has proven rich and varied, as shown in the wide array of binary, ternary, and quaternary derivatives that have been discovered so far . This structure type also features a sizeable void at Wyckoff position 4 a .…”

Magnetic properties of aluminum-substituted R–T deuterides Ho6(Fe,Al)23Dz

“…We presented recently the influence of aluminum substitution on the magnetic properties of Ho 6 Fe 23−x Al x ͑x =0,2.5,5͒ alloys. 1 The magnetic features depend in great part on the coupling between the heavy rare-earth Ho and Fe: particularly noncolinear magnetic structures, 2,3 sensitive to the aluminum content, are observed near the compensation temperature, and the presence of the rare-earth Ho "stabilizes" the Fe moment as compared to its value in isomorphous yttrium compounds Y 6 Fe 23−x Al x .…”

“…Deuterium insertion in the lattice of R -T compounds has a great influence on the magnetic Fe moment. [4][5][6][7][8] The aim of this work is thus to study the influence of the deuteration on the magnetic properties of these Al-substituted alloys. It should be noted that an insertion rate of deuterium can attain 10 and 16 at./ f.u.…”