Magnetic Field Effect on Sound Propagation in Antiferromagnets |
| A. Pawlak and B. Fechner
Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland |
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| On the basis of the theory of phase transitions, a model describing anomalies of sound attenuation coefficient close to the antiferromagnet-paramagnet phase transition in magnetic field was developed. The scaling behaviour of the sound velocity and attenuation coefficient was determined. The physical origin of the two-peak structure in the field dependent ultrasound attenuation observed in a number of antiferromagnets was identified. The theoretical results were compared with experimental results obtained for terbium. |
| DOI: 10.12693/APhysPolA.115.232 PACS numbers: 05.70.Jk, 62.65.+k |