Open AccessРамановское рассеяние кристаллами гексаборидов редких земель с различными изотопами бора
Author(s) -
Ю.Ф. Марков,
В.Н. Гурин,
К.В. Понкратов
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.04.45681.282
Subject(s) - raman spectroscopy , boron , raman scattering , isotopes of boron , degenerate energy levels , spectral line , degeneracy (biology) , analytical chemistry (journal) , materials science , lanthanum , chemistry , physics , inorganic chemistry , optics , bioinformatics , organic chemistry , chromatography , quantum mechanics , astronomy , biology
Monocrystals of lanthanum hexaboride LaB_6 containing both natural boron and its isotopes ^10B and ^11B have been produced using the solution-melt method. Polyelement hexaboride rare-earths have been grown and the corresponding ceramics have been synthesized for the first time. All these crystals have been studied by means of various techniques, generally using Raman scattering. The Raman spectra attributed to various spectral lines corresponding to nonanalyzable representations have been obtained and interpreted. Frequencies and half-widths of spectral lines have been obtained, the removal of degeneracy and the development of respective splitting of degenerate oscillations induced by defects, mainly by boron isotope inclusions, have been identified. The influence of defects on the Raman spectra has been determined.