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

页码：434 / 437

页数：4

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