Journal Article

PUBDB-2018-01590

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO$_4$

Jonane, I.Extern* ; Cintins, A.Extern* ; Kalinko, A.Extern* ; Chernikov, R.DESY* ; Kuzmin, A. (Corresponding author)Extern*

2018
AIP Publ. College Park, Md.

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Please use a persistent id in citations: doi:10.1063/1.5034155  doi:10.3204/PUBDB-2018-01590

Abstract: Thermochromic phase transition was studied in CuMoO4 using the Cu and Mo K-edge x-ray absorption spec-troscopy in the temperature range of 10–300 K. The hysteretic behavior has been evidenced from the tempera-ture dependence of the pre-edge shoulder intensity at the Mo K-edge, indicating that the transition from brownish-red γ-CuMoO$_4$ to green α-CuMoO$_4$ 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-CuMoO$_4$. This result has been supported by ab initio full-multiple-scattering x-ray absorption near edge structure (XANES) calculations.

Note: Published by AIP Publishing

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. PETRA III Extension (FS-PEX)

Research Program(s):

1. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)
3. FS-Proposal: I-20160149 EC (I-20160149-EC) (I-20160149-EC)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2018

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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