Low Temperature Physics: 33, 952 (2007); https://doi.org/10.1063/1.2747072 (5 pages)
Fizika Nizkikh Temperatur: Volume 33, Number 11 (November 2007), p. 1253-1259 ( to contents , go back )
Magneto-elastic interaction and acoustic nonreciprocity in GdNi2B2C
G.A. Zvyagina, I.E. Chupis, V.D. Fil', K.R. Zhekov, Yu.A. Avramenko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
Received March 11, 2007
The ultrasonic researches of single crystal gadolinium borocarbide has been carried out. It is found that the acoustic characteristics are very sensitive to magnetic phase transformations, due to the interaction of sound waves with the antiferromagnetic domain structure. An acoustic «nonreciprocity» with the same nature has been also discovered. Arguments in favor of the existence of weak ferromagnetism in GdNi2B2C are adduced.
PACS: 72.55.+s Magnetoacoustic effects;
Key words: sound velosity and attenuation, magnetoelastic interaction, antiferromagnetic domain structure.