Magnetic and structural properties of Mn-doped Bi2Se3 topological insulators

R. Tarasenko; M. Vališka; M. Vondráček; K. Horakova; V. Tkac; K. Carva; P. Balaz; Vaclav Holy; Gunther Springholz; V. Sechovský; J. Honolka

doi:10.1016/j.physb.2015.11.022

Magnetic and structural properties of Mn-doped Bi2Se3 topological insulators

R. Tarasenko
, M. Vališka
, M. Vondráček
, K. Horakova
, V. Tkac
, K. Carva
, P. Balaz
, Vaclav Holy
, Gunther Springholz
, V. Sechovský
, J. Honolka

Department of Semiconductor Physics

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

Abstract

A thorough investigation is presented of the magnetic and structural properties of Mn-doped Bi2Se3 topological insulators grown by molecular beam epitaxy on top of insulating BaF2 (111) substrates. The magnetic properties have been studied in the temperature range from 2 K to 300 K in magnetic fields up to 7 T. The systems were further characterized by means of high-resolution X-ray diffraction, electron-microprobe analysis, and X-ray photoemission spectroscopy. Samples with the atomic concentration of Mn up to about 0.06 exhibit an almost perfect crystalline structure while, for higher Mn concentrations, diffuse scattering from defects is observed. Photoemission results suggest a localized non-metallic Mn 3d(5) ground state which is weakly or intermediately coupled to the Bi2Se3 environment. The exchange interaction between the Mn moments leads to a ferromagnetic phase at low temperatures with a roughly linear relation between the Curie temperature and the atomic concentration of Mn. (C) 2015 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	262-267
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	481
DOIs	https://doi.org/10.1016/j.physb.2015.11.022
Publication status	Published - 15 Jan 2016

Fields of science

103 Physics, Astronomy

JKU Focus areas

Nano-, Bio- and Polymer-Systems: From Structure to Function

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10.1016/j.physb.2015.11.022

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title = "Magnetic and structural properties of Mn-doped Bi2Se3 topological insulators",

abstract = "A thorough investigation is presented of the magnetic and structural properties of Mn-doped Bi2Se3 topological insulators grown by molecular beam epitaxy on top of insulating BaF2 (111) substrates. The magnetic properties have been studied in the temperature range from 2 K to 300 K in magnetic fields up to 7 T. The systems were further characterized by means of high-resolution X-ray diffraction, electron-microprobe analysis, and X-ray photoemission spectroscopy. Samples with the atomic concentration of Mn up to about 0.06 exhibit an almost perfect crystalline structure while, for higher Mn concentrations, diffuse scattering from defects is observed. Photoemission results suggest a localized non-metallic Mn 3d(5) ground state which is weakly or intermediately coupled to the Bi2Se3 environment. The exchange interaction between the Mn moments leads to a ferromagnetic phase at low temperatures with a roughly linear relation between the Curie temperature and the atomic concentration of Mn. (C) 2015 Elsevier B.V. All rights reserved.",

author = "R. Tarasenko and M. Vali{\v s}ka and M. Vondr{\'a}{\v c}ek and K. Horakova and V. Tkac and K. Carva and P. Balaz and Vaclav Holy and Gunther Springholz and V. Sechovsk{\'y} and J. Honolka",

year = "2016",

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doi = "10.1016/j.physb.2015.11.022",

language = "English",

volume = "481",

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journal = "Physica B: Condensed Matter",

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T1 - Magnetic and structural properties of Mn-doped Bi2Se3 topological insulators

AU - Tarasenko, R.

AU - Vališka, M.

AU - Vondráček, M.

AU - Horakova, K.

AU - Tkac, V.

AU - Carva, K.

AU - Balaz, P.

AU - Holy, Vaclav

AU - Springholz, Gunther

AU - Sechovský, V.

AU - Honolka, J.

PY - 2016/1/15

Y1 - 2016/1/15

N2 - A thorough investigation is presented of the magnetic and structural properties of Mn-doped Bi2Se3 topological insulators grown by molecular beam epitaxy on top of insulating BaF2 (111) substrates. The magnetic properties have been studied in the temperature range from 2 K to 300 K in magnetic fields up to 7 T. The systems were further characterized by means of high-resolution X-ray diffraction, electron-microprobe analysis, and X-ray photoemission spectroscopy. Samples with the atomic concentration of Mn up to about 0.06 exhibit an almost perfect crystalline structure while, for higher Mn concentrations, diffuse scattering from defects is observed. Photoemission results suggest a localized non-metallic Mn 3d(5) ground state which is weakly or intermediately coupled to the Bi2Se3 environment. The exchange interaction between the Mn moments leads to a ferromagnetic phase at low temperatures with a roughly linear relation between the Curie temperature and the atomic concentration of Mn. (C) 2015 Elsevier B.V. All rights reserved.

AB - A thorough investigation is presented of the magnetic and structural properties of Mn-doped Bi2Se3 topological insulators grown by molecular beam epitaxy on top of insulating BaF2 (111) substrates. The magnetic properties have been studied in the temperature range from 2 K to 300 K in magnetic fields up to 7 T. The systems were further characterized by means of high-resolution X-ray diffraction, electron-microprobe analysis, and X-ray photoemission spectroscopy. Samples with the atomic concentration of Mn up to about 0.06 exhibit an almost perfect crystalline structure while, for higher Mn concentrations, diffuse scattering from defects is observed. Photoemission results suggest a localized non-metallic Mn 3d(5) ground state which is weakly or intermediately coupled to the Bi2Se3 environment. The exchange interaction between the Mn moments leads to a ferromagnetic phase at low temperatures with a roughly linear relation between the Curie temperature and the atomic concentration of Mn. (C) 2015 Elsevier B.V. All rights reserved.

UR - https://www.scopus.com/pages/publications/84948456558

U2 - 10.1016/j.physb.2015.11.022

DO - 10.1016/j.physb.2015.11.022

M3 - Article

SN - 0921-4526

VL - 481

SP - 262

EP - 267

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Magnetic and structural properties of Mn-doped Bi2Se3 topological insulators

Abstract

Fields of science

JKU Focus areas

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