Crystalline Structure and Magnetic Properties of Structurally Ordered Cobalt–Iron Alloys Grown on Bi-Containing Topological Insulators and Systems with Giant Rashba Splitting | Sciact - CRIS-система Института катализа

Crystalline Structure and Magnetic Properties of Structurally Ordered Cobalt–Iron Alloys Grown on Bi-Containing Topological Insulators and Systems with Giant Rashba Splitting Научная публикация

Журнал

CrystEngComm
ISSN: 1466-8033

Вых. Данные

Год: 2018, Том: 20, Номер: 24, Страницы: 3419-3427 Страниц : 9 DOI: 10.1039/c8ce00326b

Ключевые слова

CIRCULAR-DICHROISM; MICROSCOPIC ORIGIN; AB-INITIO; BAND-GAP; ANISOTROPIES; DIFFRACTION; SURFACE; SPIN

Авторы

Kaveev Andrey K. ¹ , Sokolov Nikolay S. ¹ , Suturin Sergey M. ¹ , Zhiltsov Nikita S. ¹ , Golyashov Vladimir A. ² , Kokh Konstantin A. ^3,4 , Prosvirin Igor P. ⁵ , Tereshchenko Oleg E. ^2,4 , Sawada Masahiro ⁶

Организации

1	Ioffe Institute, Saint-Petersburg, Russia
2	A.V. Rzhanov Institute of Semiconductor Physics, Novosibirsk, Russia
3	V.S. Sobolev Institute of Geology and Mineralogy, Novosibirsk, Russia
4	Novosibirsk State University, Novosibirsk 630090, Russia
5	Boreskov Institute of Catalysis, Novosibirsk, Russia
6	Hiroshima University, Higashi Hiroshima, Japan

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	17-02-00729 (АААА-А17-117041110122-7)
2	Российский научный фонд	17-12-01047

Epitaxial Co40Fe40B20 and Co55Fe45 (further – CoFe(B)) films were grown on Bi2Te3(0001) and Bi2Se3(0001) substrates by the laser molecular beam epitaxy (LMBE) technique at 200–400 °C. Structurally ordered ferromagnetic thin films were obtained on topological insulator surfaces for the first time. A body-centered cubic-type (bcc) crystalline structure of CoFe(B) with the (111) plane parallel to the (0001) plane of Bi2Te3 was observed, in contrast to the polycrystalline CoFe(B) film formed on Bi2Se3(0001) at RT using a high-temperature seeding layer. Using RHEED 3D reciprocal space mapping, the epitaxial relationships for the CoFe(B)/Bi2Te3 heterostructure were revealed. MOKE and AFM measurements showed the isotropic azimuthal in-plane behavior of the magnetization vector in CoFe(B)/Bi2Te3, in contrast to uniaxial magnetic anisotropy observed in CoFe(B)/Bi2Se3. XPS measurements showed a higher stability of CoFe(B) grown on Bi2Te3 towards oxidation, compared to that of CoFe(B) grown on Bi2Se3. XAS and XMCD measurements for both types of concerned nanostructures allowed the calculation of spin and orbital magnetic moments for Co and Fe. Additionally, we have studied the crystalline structure and magnetic properties of the CoFe(B)/BiTeI system with giant Rashba splitting.

Kaveev A.K. , Sokolov N.S. , Suturin S.M. , Zhiltsov N.S. , Golyashov V.A. , Kokh K.A. , Prosvirin I.P. , Tereshchenko O.E. , Sawada M.
Crystalline Structure and Magnetic Properties of Structurally Ordered Cobalt–Iron Alloys Grown on Bi-Containing Topological Insulators and Systems with Giant Rashba Splitting
CrystEngComm. 2018. V.20. N24. P.3419-3427. DOI: 10.1039/c8ce00326b WOS Scopus РИНЦ

Поступила в редакцию:	28 февр. 2018 г.
Принята к публикации:	4 мая 2018 г.
Опубликована online:	8 мая 2018 г.
Опубликована в печати:	28 июн. 2018 г.

Web of science	WOS:000435573500017
Scopus	2-s2.0-85048808980
РИНЦ	35742149
Chemical Abstracts	2018:905606