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

被引：9
|
作者：
Jonane, I. [1 ]
Cintins, A. [1 ]
Kalinko, A. [2 ]
Chernikov, R. [3 ]
Kuzmin, A. [1 ]
机构：
[1] Univ Latvia, Inst Solid State Phys, 8 Kengaraga Str, LV-1063 Riga, Latvia
[2] Univ Paderborn, Dept Chem, Nat Wissensch Fak, 100 Warburger Str, D-33098 Paderborn, Germany
[3] DESY Photon Sci, 85 Notkestr, D-22607 Hamburg, Germany
来源：
LOW TEMPERATURE PHYSICS | 2018年 / 44卷 / 05期
关键词：
CRYSTAL-STRUCTURE; TEMPERATURE-DEPENDENCE; BEHAVIOR; TUNGSTATES; MOLYBDATES; CATALYSTS; GLASSES; XANES; PBWO4; COLOR;
D O I：
10.1063/1.5034155
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 gamma-CuMoO4 to green alpha-CuMoO4 occurs in the temperature range of 230-280K upon heating, whereas the alpha-to-c transition occurs between 200 and 120K 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 alpha-CuMoO4 and distorted octahedral in c-CuMoO4. This result has been supported by ab initio full-multiple-scattering x-ray absorption near edge structure (XANES) calculations. Published by AIP Publishing.
引用
收藏
页码：434 / 437
页数：4
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