Crystalline structure and magnetic properties of structurally ordered cobalt-iron alloys grown on Bi-containing topological insulators and systems with giant Rashba splitting

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Crystalline structure and magnetic properties of structurally ordered cobalt-iron alloys grown on Bi-containing topological insulators and systems with giant Rashba splitting. / Kaveev, Andrey K.; Sokolov, Nikolay S.; Suturin, Sergey M. et al.

In: CrystEngComm, Vol. 20, No. 24, 28.06.2018, p. 3419-3427.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{5b6aff339f86430285add995b3f40f44,

title = "Crystalline structure and magnetic properties of structurally ordered cobalt-iron alloys grown on Bi-containing topological insulators and systems with giant Rashba splitting",

abstract = "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.",

keywords = "CIRCULAR-DICHROISM, MICROSCOPIC ORIGIN, BAND-GAP, ANISOTROPIES, DIFFRACTION, SURFACE, SPIN",

author = "Kaveev, {Andrey K.} and Sokolov, {Nikolay S.} and Suturin, {Sergey M.} and Zhiltsov, {Nikita S.} and Golyashov, {Vladimir A.} and Kokh, {Konstantin A.} and Prosvirin, {Igor P.} and Tereshchenko, {Oleg E.} and Masahiro Sawada",

year = "2018",

month = jun,

day = "28",

doi = "10.1039/c8ce00326b",

language = "English",

volume = "20",

pages = "3419--3427",

journal = "CrystEngComm",

issn = "1466-8033",

publisher = "Royal Society of Chemistry",

number = "24",

}

RIS

TY - JOUR

T1 - Crystalline structure and magnetic properties of structurally ordered cobalt-iron alloys grown on Bi-containing topological insulators and systems with giant Rashba splitting

AU - Kaveev, Andrey K.

AU - Sokolov, Nikolay S.

AU - Suturin, Sergey M.

AU - Zhiltsov, Nikita S.

AU - Golyashov, Vladimir A.

AU - Kokh, Konstantin A.

AU - Prosvirin, Igor P.

AU - Tereshchenko, Oleg E.

AU - Sawada, Masahiro

PY - 2018/6/28

Y1 - 2018/6/28

N2 - 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.

AB - 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.

KW - CIRCULAR-DICHROISM

KW - MICROSCOPIC ORIGIN

KW - BAND-GAP

KW - ANISOTROPIES

KW - DIFFRACTION

KW - SURFACE

KW - SPIN

UR - http://www.scopus.com/inward/record.url?scp=85048808980&partnerID=8YFLogxK

U2 - 10.1039/c8ce00326b

DO - 10.1039/c8ce00326b

M3 - Article

AN - SCOPUS:85048808980

VL - 20

SP - 3419

EP - 3427

JO - CrystEngComm

JF - CrystEngComm

SN - 1466-8033

IS - 24

ER -

ID: 14102869