Magnetization and magnetoacoustics of single-crystalline ErFe.sub.5./sub.Al.sub.7./sub. in high magnetic fields

0427089 - FZÚ 2015 RIV NL eng J - Journal Article
Gorbunov, Denis - Yasin, S. - Andreev, Alexander V. - Skourski, Y. - Zherlitsyn, S. - Wosnitza, J.
Magnetization and magnetoacoustics of single-crystalline ErFe₅Al₇ in high magnetic fields.
Journal of Magnetism and Magnetic Materials. Roč. 357, MAY (2014), s. 61-68. ISSN 0304-8853. E-ISSN 1873-4766
R&D Projects: GA ČR GAP204/12/0150
Grant - others:AVČR(CZ) M100101203
Institutional support: RVO:68378271
Keywords : rare-earth intermetallics * ferrimagnetism * magnetic anisotropy * high magnetic fields * field-induced transition
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.970, year: 2014

The magnetization and sound propagation in single-crystalline ErFe5Al7 were studied in steady and pulsed magnetic fields (up to 60 T). The compound is ferrimagnet with Curie temperature 201 K and compensation point 34 K. It displays a strong magnetic easy-plane anisotropy. A large magnetic anisotropy is present also within the basal plane. The [100] axis is the easy magnetization direction with spontaneous magnetic moment 1.3 µB/f at 2 K. Field-induced magnetic transitions, two along the [100] axis and two along the [110] axis, have been found in the vicinity of compensation point. Changes in the magnetic state at the transitions result in significant alterations of the spin-phonon coupling, which is manifested by sharp anomalies in the sound velocity and sound attenuation. A field-temperature phase diagram has been constructed up to 60 T.
Permanent Link: http://hdl.handle.net/11104/0232698