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-system of Boreskov Institute of Catalysis

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

Journal

CrystEngComm
ISSN: 1466-8033

Output data

Year: 2018, Volume: 20, Number: 24, Pages: 3419-3427 Pages count : 9 DOI: 10.1039/c8ce00326b

Tags

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

Authors

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

Affiliations

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

Funding (2)

1	Russian Foundation for Basic Research	17-02-00729 (АААА-А17-117041110122-7)
2	Russian Science Foundation	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 AN OpenAlex

Submitted:	Feb 28, 2018
Accepted:	May 4, 2018
Published online:	May 8, 2018
Published print:	Jun 28, 2018

Web of science:	WOS:000435573500017
Scopus:	2-s2.0-85048808980
Elibrary:	35742149
Chemical Abstracts:	2018:905606
OpenAlex:	W2802787580

DB	Citing
Web of science	10
Scopus	11
Elibrary	14
OpenAlex	14