X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Автор(и)

  • I. Jonane Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga LV-1063, Latvia
  • A. Cintins Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga LV-1063, Latvia
  • A. Kalinko Universität Paderborn, Naturwissenschaftliche Fakultät, Department Chemie, 100 Warburger Str., Paderborn 33098, Germany
  • R. Chernikov DESY Photon Science, 85 Notkestraße, Hamburg D-22607, Germany
  • A. Kuzmin Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga LV-1063, Latvia

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.5034155

Ключові слова:

x-ray absorption spectroscopy, CuMoO4, thermochromism, phase transition.

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.

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Опубліковано

2018-03-19

Як цитувати

(1)
I. Jonane, A. Cintins, A. Kalinko, R. Chernikov, and A. Kuzmin, X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4, Low Temp. Phys. 44, (2018) [Fiz. Nizk. Temp. 44, 568-572, (2018)] DOI: https://doi.org/10.1063/1.5034155.

Номер

Том 44 № 5 (2018)

Розділ

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