Magnetic and magnetoelastic anomalies of an Er.sub.2./sub.Co.sub.17./sub. single crystal in high magnetic fields

0361454 - FZÚ 2012 RIV US eng J - Journal Article
Andreev, Alexander V. - Skourski, Y. - Kuz'min, M.D. - Yasin, S. - Zherlitsyn, S. - Daou, R. - Wosnitza, J. - Iwasa, A. - Kondo, A. - Matsuo, A. - Kindo, K.
Magnetic and magnetoelastic anomalies of an Er₂Co₁₇ single crystal in high magnetic fields.
Physical Review. B. Roč. 83, č. 18 (2011), "184422-1"-"184422-9". ISSN 1098-0121
R&D Projects: GA ČR GA202/09/0339
Institutional research plan: CEZ:AV0Z10100520
Keywords : magnetic and magnetoelastic anomalies * high magnetic fields * anisotropy constants
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.691, year: 2011

A high-field study of magnetization (up to 68 T) and magnetoelastic properties (up to 60 T) of Er2Co17 is reported. The most significant effect - a first-order transition from the collinear ferrimagnetic to a canted state - is observed at about 40 T with H ll [001]. The transition is accompanied by a prominent magnetization jump as well as by step-wise anomalies of the magnetoelastic properties. The volume of the crystal reduces by about 4 per mil, while the speed of transverse sound in the [001] direction increases by as much as 5 per mil. At higher temperatures, the anomalies gradually become smaller and less sharp, before they finally disappear at 50 K. The anisotropy constants of the Er sublattice and the molecular field thereon have been determined from the magnetization curves.
Permanent Link: http://hdl.handle.net/11104/0198763