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Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Ding Y., Haskel D., Ovchinnikov S. G., Tseng Y. C., Orlov Y. S., Lang J. C., Mao H. K.
Заглавие
: Novel pressure-induced magnetic transition in magnetite (Fe(3)O(4))
Разночтения заглавия
:авие SCOPUS: Novel pressure-induced magnetic transition in magnetite (Fe3O4)
Место публикации
: Phys. Rev. Lett.: AMER PHYSICAL SOC, 2008. - Vol. 100, Is. 4. - Ст.45508. - ISSN 0031-9007,
DOI
10.1103/PhysRevLett.100.045508
Примечания
: Cited References: 39
Предметные рубрики:
MULTIPLE-SCATTERING THEORY
X-RAY
DICHROISM
LOWER MANTLE
VERWEY TRANSITION
K-EDGE
CIRCULAR
-
DICHROISM
SPIN TRANSITION
BAND-STRUCTURE
IRON
FE
Ключевые слова
(''Своб.индексиров.''): emission spectroscopy--magnetoelectronics--pressure effects--synchrotron radiation--diamond anvil cell--magnetic transition--x-ray magnetic
circular
dichroism
--magnetite
Аннотация:
Fe K-edge x-ray magnetic
circular
dichroism
of magnetite (Fe(3)O(4)) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic
dichroism
was observed to decrease discontinuously by similar to 50% between 12 and 16 GPa, independent of temperature. The magnetic transition is attributed to a high-spin to intermediate-spin transition of Fe(2+) ions in the octahedral sites and could account for previously observed structural and electrical anomalies in magnetite at this pressure range. The interpretation of x-ray magnetic
circular
dichroism
data is supported by x-ray emission spectroscopy and theoretical cluster calculations.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Ovchinnikov S. G.
Заглавие
: Application of synchrotron radiation to the study of magnetic materials
Место публикации
: Uspekhi Fiz. Nauk: MEZHDUNARODNAYA KNIGA, 1999. - Vol. 169, Is. 8. - P.869-887. - ISSN 0042-1294
Примечания
: Cited References: 93
Предметные рубрики:
X-RAY-SCATTERING
RESONANCE EXCHANGE SCATTERING
RARE-EARTH-METALS
CIRCULAR
-
DICHROISM
VALENCE STATES
CO/PD(111) MULTILAYERS
ABSORPTION-SPECTRA
PHASE-TRANSITIONS
SPIN POLARIZATION
EDGE STRUCTURE
Аннотация:
The recent results of the studies of magnetic materials using synchrotron irradiation are reviewed. The influence of magnetic effects on X-ray scattering is studied for linearly and circularly polarized photons, and effects of magnetic
circular
dichroism
on the spectra of X-ray absorption and photoelectron emission are discussed. It is shown that X-ray magnetooptics techniques provide fine details of crystal and magnetic structures and also make it possible to separate the spin and orbital contributions to the total moment; to obtain element- and position-sensitive information on the magnetic properties of the material; to visualize domains and domain walls; and to probe magnetization reversal dynamics. A comparison of magnetic neutron and X-ray methods is given.
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3.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Samardak, Alexander S., Ognev, Alexey, V, Kolesnikov, Alexander G., Stebliy, Maksim E., Samardak, Vadim Yu, Iliushin, Ilia G., Pervishko, Anastasiia A., Yudin, Dmitry, Platunov M. S., Ono, Teruo, Wilhelm, Fabrice, Rogalev, Andrey
Заглавие
: XMCD and ab initio study of interface-engineered ultrathin Ru/Co/W/Ru films with perpendicular magnetic anisotropy and strong Dzyaloshinskii-Moriya interaction
Коллективы
: Russian Ministry of Science and Higher Education [075-15-2021-607, 0657-2020-0013]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-32-60020]; Russian Federation President Scholarship for Young Scientists [SP-1640.2021.5]; Russian Science FoundationRussian Science Foundation (RSF) [21-42-00041]; Russian Ministry of Science and Higher Education
Место публикации
: Phys. Chem. Chem. Phys. - 2022. - Vol. 24, Is. 14. - P.8225-8232. - ISSN 1463-9076,
DOI
10.1039/d1cp05456b. - ISSN 1463-9084(eISSN)
Примечания
: Cited References: 47. - A. V. O., I. G. I. and T. O. thank the Russian Ministry of Science and Higher Education for state support of scientific research conducted under the supervision of leading scientists in Russian institutions of higher education, scientific foundations and state research centers (Project No. 075-15-2021-607) in parts of sample preparation and its magnetic characterization. The micromagnetic simulations performed by M. E. S. were supported by the Russian Ministry of Science and Higher Education under the state task (0657-2020-0013). A. A. P. (ab initio calculations) acknowledges the support from the Russian Foundation for Basic Research (Project No. 19-32-60020) and the Russian Federation President Scholarship for Young Scientists (SP-1640.2021.5). The work of A. S. S. related to the experimental and analytical study of DMI and skyrmion bubbles was supported by the Russian Science Foundation (Project No. 21-42-00041). The authors acknowledge the use of computational resources of the Skoltech supercomputer Zhores47 to obtain the theoretical results presented in this paper. The authors thank ID12 beamline staff for their help during the XMCD experiment and gratefully acknowledge the provision of beamtime (Proposal MA-3661) by the ESRF. The research contribution of M. P. (XMCD anaysis) was partially funded by the Russian Ministry of Science and Higher Education via the budget project of SRF SKIF, Boreskov Institute of Catalysis
Предметные рубрики:
TOTAL-ENERGY CALCULATIONS
CIRCULAR
-
DICHROISM
MOLECULAR-DYNAMICS
Аннотация:
Understanding the nature of recently discovered spin–orbital induced phenomena and a definition of a general approach for “ferromagnet/heavy-metal” layered systems to enhance and manipulate spin–orbit coupling, spin–orbit torque, and the Dzyaloshinskii–Moriya interaction (DMI) assisted by atomic-scale interface engineering are essential for developing spintronics and spin-orbitronics. Here, we exploit X-ray magnetic
circular
dichroism
(XMCD) spectroscopy at the L2,3-edges of 5d and 4d non-magnetic heavy metals (W and Ru, respectively) in ultrathin Ru/Co/W/Ru films to determine their induced magnetic moments due to the proximity to the ferromagnetic layer of Co. The deduced orbital and spin magnetic moments agree well with the theoretically predicted values, highlighting the drastic effect of constituting layers on the system's magnetic properties and the strong interfacial DMI in Ru/Co/W/Ru films. As a result, we demonstrate the ability to simultaneously control the strength of magnetic anisotropy and intermixing-enhanced DMI through the interface engineered inversion asymmetry in thin-film chiral ferromagnets, which are a potential host for stable magnetic skyrmions.
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