Open AccessИсследование спинового перехода в монокристалле LaCoO-=SUB=-3-=/SUB=- методом рентгеновского магнитного кругового дихроизма на K- и L-=SUB=-2,3-=/SUB=--краях кобальта
Author(s) -
V. V. Sikolenko,
И.О. Троянчук,
Д. В. Карпинский,
A. Rogalev,
F. Wilhelm,
R. A. Rosenberg,
D. Prabhakaran,
Е. А. Ефимова,
В. В. Ефимов,
S. I. Tiutiunnikov,
И.А. Бобриков
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.02.45382.204
Subject(s) - cobalt , magnetic circular dichroism , ion , magnetization , atmospheric temperature range , angular momentum , condensed matter physics , range (aeronautics) , spin (aerodynamics) , atomic physics , magnetic field , chemistry , physics , materials science , inorganic chemistry , spectral line , organic chemistry , quantum mechanics , astronomy , meteorology , composite material , thermodynamics
AbstractSpin transitions of cobalt ions in LaCoO_3 single crystals have been studied by the method of X-ray magnetic circular dichroism (XMCD) at the K - and L _2,3-edges of Co^3+ ions. The orbital momentum of cobalt ions obtained for the K -edge at the 3 d level in the region of the spin transition in the temperature range from 25 to 120 K increases by a factor of approximately 1.6, whereas the slope of the magnetization curve value in the same temperature range and magnetic field increases by a factor of more than 10. XMCD experiments at the cobalt L _2,3-edges demonstrate gradual growth of the ratio of the orbital momentum to the spin one L / S from 0.48 to 0.53 in the temperature range from 60 K to 120 K.