Abstract
The magnetic properties of the Ho6−xYxFe23Dz (x=0, 0.5, 1 and z=0, 16) deuterides and of the parent alloys are studied under high dc magnetic field (230kOe) on samples oriented parallel and perpendicular to the external field in the 4.2–300K temperature range. All compounds that retain the cubic Fm3m crystallographic structure present canted ferrimagnetic structure. For most of the samples, field-induced transitions characterized by a linear variation of M above the transition field are found. Upon deuteration drastic changes of the magnetic properties are observed and the main “magnetic parameters” are then determined. In the alloys the exchange interaction Ho–Fe increases when the yttrium content increases but decreases in the deuterides. For all alloys the Curie temperature remains close to 510K.
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