Magnetodielectrical and magnetopiezoelectrical effects in NdFe3(BO3)4
I.V. Bilych1, K.R. Zhekov1, T.N. Gaydamak1, I.A. Gudim2, G.A. Zvyagina1, and V.D. Fil1
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
2L.V. Kirenskiy Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk 660036, Russia
Received Jule 28, 2016
Magnetodielectrical (magnetocapacitence) and magnetopiezoelectrical effects were systematically investigated in neodimiym ferroborate. The existence of the detected previously in samarium ferroborate magnetopiezoelectrical effect has been confirmed. This effect is indirect renormalization of the piezoelectric module as a result of the joint action of the magnetoelectric and magnetoelastic mechanisms. The manifestation of a new type of effect — direct renormalization of the piezoelectric interaction in magnetically ordered phase has been revealed. The ratio of contributions of rare-earth and iron systems in magnetoelectric interaction has been estimated. It was shown that the last plays the role of ballast, which loads orientation oscillations of the magnetic structure as a whole. Boundaries of the existence of helical phase have been defined on the plane of H–T parameters. The phenomenological interpretation of the studied effects is given.