Co K-Edge Magnetic Circular Dichroism Across the Spin State Transition in LaCoO3 Single Crystal
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
16th International Conference on X-ray Absorption Fine Structure
23-28 авг. 2015
,
Karlsruhe
|
| Журнал |
Journal of Physics: Conference Series
ISSN: 1742-6588
, E-ISSN: 1742-6596
|
| Вых. Данные |
Год: 2016,
Том: 712,
Страницы: 012111
Страниц
: 4
DOI:
10.1088/1742-6596/712/1/012111
|
| Авторы |
Efimov V.
1
,
Ignatov A.
2
,
Troyanchuk I.O.
3
,
Sikolenko V.V.
1,4
,
Rogalev A.
5
,
Wilhelm F.
5
,
Efimova E.
1
,
Tiutiunnikov S.I.
1
,
Karpinsky D.
3
,
Kriventsov V.
6
,
Yakimchuk E.
6
,
Molodtsov S.
7
,
Sainctavit P.
8
,
Prabhakaran D.
9
|
| Организации |
| 1 |
Joint Institute for Nuclear Research, 141980 Dubna, Russia
|
| 2 |
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
|
| 3 |
Scientific-Practical Material Research Center NAS Belarus, 220072 Minsk, Belarus
|
| 4 |
REC "Functional nanomaterials" Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia
|
| 5 |
European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France
|
| 6 |
Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia
|
| 7 |
European XFEL Gmbh, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
|
| 8 |
Institut de minéralogie et de physique des milieux condensés CNRS F-75012, France
|
| 9 |
Department of Physics, University of Oxford, OX1 3PU, Oxford, Great Britain
|
|
Информация о финансировании (2)
|
1
|
Российский фонд фундаментальных исследований
|
13-02-00699
|
|
2
|
Российский фонд фундаментальных исследований
|
15-32-50367
|
We report on Co K-edge x-ray magnetic circular dichroism (XMCD) measurements of LaCoO3 single crystal in temperature range from 5 to 300 K and external magnetic field of 17 T. The response consists of pre-edge (at 7712 eV) and bi-polar peak (up at 7727, down at 7731 eV) with amplitudes, respectively, less than 10-3 and 10-2 of the Co K-edge jump. Using the sum rule the orbital magnetic moment of 4p Co is evaluated. Its temperature dependence
reaches a maximum of (2.7 ± 0.9) x 10-3 µB at 120 K, following the trend for the total magnetic moment on the Co obtained from the superconducting quantum interference device measurements. However, on warming from 25 to 120 K, the orbital magnetic moment of the 4p Co doubles while total magnetic moment of Co increases 10 times. First principle calculations are in order to relate the Co K-edge XMCD results to the orbital and spin moment of 3d Co.