High-field magnetization study of a Tm.sub.2./sub.Co.sub.17./sub. single crystal

0343117 - FZÚ 2011 RIV US eng J - Journal Article
Andreev, Alexander V. - Kuz'min, M.D. - Narumi, Y. - Skourski, Y. - Kudrevatykh, N. V. - Kindo, K. - de Boer, F.R. - Wosnitza, J.
High-field magnetization study of a Tm₂Co₁₇ single crystal.
Physical Review. B. Roč. 81, č. 13 (2010), 134429/1-134429/5. ISSN 1098-0121
R&D Projects: GA ČR GA202/09/0339
Grant - others:EuroMagNET(XE) 228043
Institutional research plan: CEZ:AV0Z10100520
Keywords : rare-earth intermetallics * ferrimagnetism * high-field transition
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.772, year: 2010

Tm2Co17 is a ferrimagnet with TC=1170 K and, at 4.2 K, has a spontaneous magnetic moment Ms=13.4 mB/f Magnetization curves were measured on single crystal along the principal axes in pulsed magnetic fields up to 70 T. The curve along the easy [001] direction exhibits a distinct anomaly at Hcr=39 T, where the magnetization exhibits a stepwise rise from Ms to Mflip=40.6 mB/f The observed transition from the ferrimagnetic ground state to the saturated spin-flip state with parallel orientation of the sublattice moments is unusual for 3d-4f intermetallics because it does not proceed via an intermediate angled-sublattice state. Rather, a collinear remagnetization of the Tm sublattice takes place: as the applied magnetic field grows, the Tm moments disorder at first, reaching a fully disordered paramagnetic state at H=Hcr, then they order magnetically in the opposite sense.
Permanent Link: http://hdl.handle.net/11104/0185668