Open AccessИК-люминесценция alpha-Al-=SUB=-2-=/SUB=-O-=SUB=-3-delta-=/SUB=- при 4-300 K
Author(s) -
М.Н. Сарычев,
I. I. Milman,
Александр Иванович Сюрдо,
Р.М. Абашев,
В.С. Воинов
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.22.46924.17332
Subject(s) - corundum , photoluminescence , stoichiometry , ion , crystallography , materials science , type (biology) , electron , analytical chemistry (journal) , chemistry , physics , nuclear physics , optoelectronics , ecology , organic chemistry , chromatography , metallurgy , biology
It is established that simple color centers of the F ^+ and F type (anion vacancies with one or two electrons, respectively) in anion-deficient corundum (α-Al_2O_3–δ) crystals can be transformed into complex centers (including divacancy centers of the F _2 type) using a special thermo-optical treatment. A fine structure of the photoluminescence bands of complex centers of both the known and unknown natures was recorded in these crystals at helium temperatures in the near-IR range. A comparison with the photoluminescence bands in neutron-irradiated α-Al_2O_3 samples with the initial stoichiometric composition reveals their complete similarity, which indicates the possibility of nonradiative formation of complex centers in α-Al_2O_3.