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 - Článek v odborném periodiku
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
Grant CEP: GA ČR GA202/09/0339
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: magnetic and magnetoelastic anomalies * high magnetic fields * anisotropy constants
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.691, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0198763