Structural and magnetic properties of YAl.sub.3./sub.(BO.sub.3./sub.).sub.4./sub. and EuAl.sub.3./sub.(BO.sub.3./sub.).sub.4./sub. single crystals doped with Co.sup.2+./sup.

0493532 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Prokhorov, Andriy - Chernush, L.F. - Minyakaev, R. - Mazur, A. - Zajarniuk, T. - Szewczyk, A. - Dyakonov, V. - Lančok, Ján - Prokhorov, A.D.
Structural and magnetic properties of YAl₃(BO₃)₄ and EuAl₃(BO₃)₄ single crystals doped with Co²⁺.
Journal of Alloys and Compounds. Roč. 765, Oct (2018), s. 710-720. ISSN 0925-8388. E-ISSN 1873-4669
Grant CEP: GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Institucionální podpora: RVO:68378271
Klíčová slova: EPR * NMR * RAB * X-ray diffraction * PPMS * multiferroics * rare-earth * aluminum borates * spin Hamiltonian parameters * superposition model
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.175, rok: 2018

Structural and magnetic properties of the cobalt-doped YAl3(BO3)4 and EuAl3(BO3)4 crystals were studied using electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR), X-ray diffraction analysis, and specific heat methods. It was found that cobalt, when doped to the studied crystals, is in divalent state, substitutes the aluminum ions and forms a system of three magnetically equivalent magnetically nonequivalent centers whose magnetic axes are rotated at 120° relative to one another. We have determined parameters of the spin Hamiltonian of orthorhombic symmetry, describing the anisotropic angular dependence EPR spectra for both types of crystals. Strong broadening of EPR lines is caused by the spin-lattice relaxation
Trvalý link: http://hdl.handle.net/11104/0286886