Mössbauer Study of the Magnetic Transition in ϵ-Fe2O3 Nanoparticles Using Synchrotron and Radionuclide Sources
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Journal of Experimental and Theoretical Physics Letters (JETP Letters)
ISSN: 0021-3640
, E-ISSN: 1090-6487
|
| Вых. Данные |
Год: 2019,
Том: 110,
Номер: 9,
Страницы: 613-617
Страниц
: 5
DOI:
10.1134/S0021364019210082
|
| Ключевые слова |
NUCLEAR RESONANT SCATTERING; HIGH-TEMPERATURE; RAYS |
| Авторы |
Knyazev Yu.V.
1
,
Chumakov A.I.
2
,
Dubrovskiy A.A.
1
,
Semenov S.V.
1
,
Yakushkin S.S.
3
,
Kirillov V.L.
3
,
Martyanov O.N.
3
,
Balaev D.A.
1
|
| Организации |
| 1 |
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036 Russia
|
| 2 |
European Synchrotron Radiation Facility (ESRF), F-38043 Grenoble Cedex 9, France
|
| 3 |
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
|
|
Информация о финансировании (1)
|
1
|
Российский научный фонд
|
17-12-01111
|
Nuclear γ-resonance experiments with energy and time resolved detection are carried out with ϵ-F2O3 nanoparticles and a 57Co(Rh) laboratory Mössbauer source of γ radiation and a 14.4125 keV synchrotron radiation source on the ID18 beamline (ESRF) in the temperature range of 4–300 K. Both methods show a tremendous increase in the hyperfine field in tetrahedrally coordinated iron positions during the magnetic transition in the range of 80–150 K. As a result, the splitting of the quantum beat peaks in the nuclear scattering spectra is observed in the time interval of 20–170 ns with a periodicity of ∼ 30 ns. In addition, the first quantum beat is slightly shifted to shorter times. A correlation between the quadrupole shift and the orbital angular momentum of iron in ϵ-F2O3 nanoparticles is found. The magnetic transition leads to the rotation of the magnetic moment in the tetrahedral positions of iron around the axis of the electric field gradient by an angle of 44°. © 2019, Pleiades Publishing, Inc.