Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO₄
Репозиторій DSpace/Manakin
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X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO₄
Тема:
Динамика кристаллической решетки
Інший ID:
PACS: 61.05.cj, 64.70.kp
Посилання:
X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO₄ / I. Jonane, A. Cintins, A. Kalinko, R. Chernikov, A. Kuzmin // Физика низких температур. — 2018. — Т. 44, № 5. — С. 568-572. — Бібліогр.: 39 назв. — англ.
Підтримка:
Financial support provided by Scientific Research Project
for Students and Young Researchers Nr. SJZ/2017/5 realized
at the Institute of Solid State Physics, University of Latvia is
greatly acknowledged. The experiment at HASYLAB/DESY
was performed within the project I-20160149 EC.
Дата:
2018
Переглядів:
352
Завантажень:
189
Анотація:
Thermochromic phase transition was studied in CuMoO₄ using the Cu and Mo K-edge x-ray absorption spectroscopy in the temperature range of 10–300 K. The hysteretic behavior has been evidenced from the temperature dependence of the pre-edge shoulder intensity at the Mo K-edge, indicating that the transition from brownish-red γ-CuMoO₄ to green α-CuMoO₄ occurs in the temperature range of 230–280 K upon heating, whereas the α-to-γ transition occurs between 200 and 120 K upon cooling. Such behavior of the pre-edge shoulder at the Mo K-edge correlates with the change of molybdenum coordination between distorted tetrahedral in α-CuMoO₄ and distorted octahedral in γ-CuMoO₄. This result has been supported by ab initio full-multiple-scattering x-ray absorption near edge structure (XANES) calculations.
