EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges

J. Gaidelene; R. Kalendarev; A. Kuzmin; J. Purans

doi:10.1016/j.nima.2004.06.023

EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges

J. Gaidelene
, R. Kalendarev
, A. Kuzmin^*
, J. Purans

^*Corresponding author for this work

University of Latvia

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

Abstract

Mixed nickel molybdenum oxide thin films were produced by DC magnetron co-sputtering technique with the nickel content about 8, 16 and 25at%. X-ray absorption spectroscopy at the Ni and Mo K-edges was used to study the local atomic structure in the films. The best-fit analysis of the EXAFS signals suggests that (i) the films are amorphous, except for the highest nickel content (25at%), at which a segregation of NiO phase was observed; (ii) nickel and molybdenum atoms are octahedrally coordinated by oxygen atoms. Opposite to the NiO₆ octahedra, the MoO₆ octahedra are strongly distorted, that results in an existence of two groups of oxygen atoms - four nearest at ∼1.76Å and two distant at ∼2.2Å. It was also found that the MoO₆ octahedra are joined by edges, with the Mo-Mo distance about 3.26-3.31Å.

Original language	English
Pages (from-to)	321-326
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	531
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nima.2004.06.023
Publication status	Published - 21 Sept 2004
Event	Proceedings of the 5th International Worshop on Radiation - Riga, Latvia Duration: 7 Sept 2003 → 11 Sept 2003

Keywords

EXAFS
Mo K-edge
Ni K-edge
Nickel molybdenum oxide thin film

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10.1016/j.nima.2004.06.023

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@article{a7df4f9e41e34f6e996fe22ed410a2d6,

title = "EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges",

abstract = "Mixed nickel molybdenum oxide thin films were produced by DC magnetron co-sputtering technique with the nickel content about 8, 16 and 25at\%. X-ray absorption spectroscopy at the Ni and Mo K-edges was used to study the local atomic structure in the films. The best-fit analysis of the EXAFS signals suggests that (i) the films are amorphous, except for the highest nickel content (25at\%), at which a segregation of NiO phase was observed; (ii) nickel and molybdenum atoms are octahedrally coordinated by oxygen atoms. Opposite to the NiO6 octahedra, the MoO6 octahedra are strongly distorted, that results in an existence of two groups of oxygen atoms - four nearest at ∼1.76{\AA} and two distant at ∼2.2{\AA}. It was also found that the MoO6 octahedra are joined by edges, with the Mo-Mo distance about 3.26-3.31{\AA}.",

keywords = "EXAFS, Mo K-edge, Ni K-edge, Nickel molybdenum oxide thin film",

author = "J. Gaidelene and R. Kalendarev and A. Kuzmin and J. Purans",

year = "2004",

month = sep,

day = "21",

doi = "10.1016/j.nima.2004.06.023",

language = "English",

volume = "531",

pages = "321--326",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

number = "1-2",

note = "Proceedings of the 5th International Worshop on Radiation ; Conference date: 07-09-2003 Through 11-09-2003",

}

EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges. / Gaidelene, J.; Kalendarev, R.; Kuzmin, A. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 531, No. 1-2, 21.09.2004, p. 321-326.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges

AU - Gaidelene, J.

AU - Kalendarev, R.

AU - Kuzmin, A.

AU - Purans, J.

PY - 2004/9/21

Y1 - 2004/9/21

N2 - Mixed nickel molybdenum oxide thin films were produced by DC magnetron co-sputtering technique with the nickel content about 8, 16 and 25at%. X-ray absorption spectroscopy at the Ni and Mo K-edges was used to study the local atomic structure in the films. The best-fit analysis of the EXAFS signals suggests that (i) the films are amorphous, except for the highest nickel content (25at%), at which a segregation of NiO phase was observed; (ii) nickel and molybdenum atoms are octahedrally coordinated by oxygen atoms. Opposite to the NiO6 octahedra, the MoO6 octahedra are strongly distorted, that results in an existence of two groups of oxygen atoms - four nearest at ∼1.76Å and two distant at ∼2.2Å. It was also found that the MoO6 octahedra are joined by edges, with the Mo-Mo distance about 3.26-3.31Å.

AB - Mixed nickel molybdenum oxide thin films were produced by DC magnetron co-sputtering technique with the nickel content about 8, 16 and 25at%. X-ray absorption spectroscopy at the Ni and Mo K-edges was used to study the local atomic structure in the films. The best-fit analysis of the EXAFS signals suggests that (i) the films are amorphous, except for the highest nickel content (25at%), at which a segregation of NiO phase was observed; (ii) nickel and molybdenum atoms are octahedrally coordinated by oxygen atoms. Opposite to the NiO6 octahedra, the MoO6 octahedra are strongly distorted, that results in an existence of two groups of oxygen atoms - four nearest at ∼1.76Å and two distant at ∼2.2Å. It was also found that the MoO6 octahedra are joined by edges, with the Mo-Mo distance about 3.26-3.31Å.

KW - EXAFS

KW - Mo K-edge

KW - Ni K-edge

KW - Nickel molybdenum oxide thin film

UR - https://www.scopus.com/pages/publications/4544327119

U2 - 10.1016/j.nima.2004.06.023

DO - 10.1016/j.nima.2004.06.023

M3 - Conference article

AN - SCOPUS:4544327119

SN - 0168-9002

VL - 531

SP - 321

EP - 326

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 1-2

T2 - Proceedings of the 5th International Worshop on Radiation

Y2 - 7 September 2003 through 11 September 2003

ER -

EXAFS study of mixed nickel molybdenum oxide thin films at the Ni and Mo K-edges

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