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High-field magnetization study of a HoFe.sub.6./sub.Al.sub.6./sub. single crystal

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    0449248 - FZÚ 2016 RIV NL eng J - Journal Article
    Gorbunov, Denis - Andreev, Alexander V. - Skourski, Y. - Tereshina, Evgeniya
    High-field magnetization study of a HoFe6Al6 single crystal.
    Journal of Alloys and Compounds. Roč. 648, Nov (2015), s. 488-493. ISSN 0925-8388
    R&D Projects: GA ČR GAP204/12/0150
    Grant - others:AVČR(CZ) M100101203
    Institutional support: RVO:68378271
    Keywords : rare-earth intermetallics * magnetic anisotropy * ferrimagnetism * high magnetic fields * field-induced transition
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 3.014, year: 2015

    Magnetization measurements have been performed in static (up to 14 T) and pulsed (up to 60 T) magnetic fields on a HoFe6Al6 single crystal with a tetragonal crystal structure. It is a ferrimagnet with exact compensation of the Ho and Fe sublattices at low temperatures, the spontaneous magnetic moment is zero at 4.2 K. At elevated temperatures, it passes through a wide maximum (4.2 mB at 200 K) and vanishes at TC = 315 K. The compound displays a high magnetic anisotropy of the easy-plane type with the [110] axis as the easy magnetization direction. The compound exhibits two field-induced magnetic phase transitions along the easy [110] axis and two more along the [100] axis, the hard direction in the basal plane. The critical fields of the lower- and higher-field transitions display qualitatively different temperature dependencies. A T-H magnetic phase diagram has been constructed for the [100] and [110] directions.
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