EXAFS and X-Ray Diffraction Study of LaCoO3 Across the Spin-State Transition
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
16th International Conference on X-ray Absorption Fine Structure
23-28 Aug 2015
,
Karlsruhe
|
| Journal |
Journal of Physics: Conference Series
ISSN: 1742-6588
, E-ISSN: 1742-6596
|
| Output data |
Year: 2016,
Volume: 712,
Pages: 012118
Pages count
: 4
DOI:
10.1088/1742-6596/712/1/012118
|
| Authors |
Sikolenko V.V.
1,9
,
Troyanchuk I.O.
2
,
Efimov V.V.
1
,
Efimova E.A.
1
,
Tiutiunnikov S.I.
1
,
Karpinsky D.V.
2
,
Pascarelli S.
3
,
Zaharko O.
4
,
Ignatov A.
5
,
Aquilanti D.
6
,
Selyutin A.G.
7
,
Shmakov A.N.
7
,
Prabhakaran D.
8
|
| Affiliations |
| 1 |
Joint Institute for Nuclear Research, 141980 Dubna, Russia
|
| 2 |
Scientific-Practical Material Research Center NAS Belarus, 220072 Minsk, Belarus
|
| 3 |
European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France
|
| 4 |
Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, CH-5232 Villigen PSI, Switzerland
|
| 5 |
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
|
| 6 |
Elettra synchrotron Trieste, 34149 Trieste, Italy
|
| 7 |
Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia
|
| 8 |
Department of Physics, University of Oxford, OX1 3PU, Oxford, Great Britain
|
| 9 |
REC "Functional nanomaterials" Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia
|
|
Funding (2)
|
1
|
Russian Foundation for Basic Research
|
13-02-00699
|
|
2
|
Russian Foundation for Basic Research
|
15-32-50378
|
A combined high-resolution Co K-edge extended x-ray absorption fine structure (EXAFS) and high-resolution X-ray powder diffraction (XRD) study has been performed to clarify the detail of anomalous behavior of temperature-dependent magnetic susceptibility curve on the LaCoO3 across the spin-state (~120 K) transition. According to XRD analysis, the Debye-Waller factor of Co-O bond exhibit rapid growth below 20 K whereas the temperature
dependence of the average Co-O bond length shows linear behavior from 10 K to 400 K. The EXAFS data show an anomalous decrease of the Co–O bond lengths with respect to those obtained by XRD. No local distortion of CoO6 octahedral as temperature increases up to 400 K has been detected.