年間 12 号発行
ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009
Indexed in
ACOUSTIC SPIN-WAVE RESONANCES IN THE STRAINED CRYSTAL OF IRON BORATE
要約
Antiferromagnet (and "weak" ferromagnet simultaneously) FeBO3 (iron borate) has some unique properties. A high Neel temperature and a vast uniform exchange field result in a strong magneto-elastic coupling. The peculiarities of dynamic effects of strong magneto-elastic coupling in the iron borate are of substantial physical interest, as dynamic and static elastic strains can change magnetic properties of the crystal. When studying the longitudinal hypersound wave propagation along the axis of symmetry C3 of FeBO3 crystal in the magnetic field, the authors have found out the oscillation structures of the amplitude and phase of the transmission coefficient. Previously, the authors offered the physical model of the phenomenon. It consists in that in the mode of standing sound wave a magnetic modulation (incommensurable) structure can appear in the sample. In the present work we have investigated experimentally the frequency dependence of resonances, observed in the external magnetic field, and carried out their numerical simulation. Analysis and comparison of experimental and simulation results show a good qualitative agreement between the selected model of sound-magnetic system interaction and numerical simulation results. The phenomenon observed is very attractive from the viewpoint of its applications in spintronics, acusto-optics and acusto-electronics.