Eur. Phys. J. B 22, 327-333 (2001)
https://doi.org/10.1007/s100520100800

Elastic properties of ferromagnetic EuB₆ ^*

¹ Physikalisches Institut, Universität Frankfurt, 60054 Frankfurt, Germany
² Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
³ Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093 Zürich, Switzerland
⁴ National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA

Corresponding author: ^a zherlitsyn@physik.uni-frankfurt.de

Received: 7 May 2001
Published online: 15 August 2001

Abstract

Results of an ultrasonic investigation of EuB₆ at low temperatures are reported. Both longitudinal and transverse acoustic modes exhibit anomalies in the vicinity of the low-temperature phase transitions of EuB₆. The ultrasound data serve to establish part of the B-T phase diagram of EuB₆. At magnetic fields exceeding 3 T, magneto-acoustic quantum oscillations (MAQO) are observed. The nature of the acoustic anomalies and possible phases in external magnetic fields are discussed. Also a comparison with the elastic properties of other rare-earth (RE) hexaboride compounds is made.