Open AccessКвантовая теория пьезоэлектрического эффекта в редкоземельных ферроборатах
Author(s) -
А.И. Попов,
Д.И. Плохов,
А.К. Звездин
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.03.50592.241
Subject(s) - piezoelectricity , ion , dipole , samarium , crystal (programming language) , condensed matter physics , materials science , neodymium , polarization (electrochemistry) , electric field , atmospheric temperature range , single crystal , rare earth , crystallography , chemistry , physics , optics , thermodynamics , laser , inorganic chemistry , organic chemistry , quantum mechanics , computer science , metallurgy , composite material , programming language
Quantum theory of piezoelectric effect in rare-earth ferroborates has been developed. It was found that single-ion mechanisms are predominantly responsible for the effect: electric dipole moments are induced directly in the electronic $4f$ shells of rare-earth ions in the presence of mechanical stresses in a crystal, which leads to the polarization of the crystal. The effect is quantitatively considered using the example of neodymium and samarium ferroborates, in particular, in the temperature range from 0 K to 300 K, the temperature dependences of piezoelectric modules are obtained. It is additionally shown that it is also possible for the crystal to become polarized along the crystallographic $c$-axis at the temperatures below the Néel point upon deformation of the crystal in a magnetic field. The temperature, field and orientation dependences of magnetically induced piezomodules are calculated.