Ferromagnetism in thin-film Cr-doped topological insulator Bi2Se3

P.P.J. Haazen; J.B. Laloe; T.J. Nummy; H.J.M. Swagten; P. Jarillo-Herrero; D. Heiman; J.S. Moodera

doi:10.1063/1.3688043

Ferromagnetism in thin-film Cr-doped topological insulator Bi2Se3

P.P.J. Haazen, J.B. Laloe, T.J. Nummy, H.J.M. Swagten, P. Jarillo-Herrero, D. Heiman, J.S. Moodera

Physics of Nanostructures

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Abstract

We report on the observation of ferromagnetism in epitaxial thin films of the topological insulator compound Bi2Se3 with chromium doping. The structural, magnetic, and magnetoelectrical properties of Bi2Se3 were investigated for Cr concentrations up to 10%. For a Cr content up to similar to 5% the films are of good crystalline quality, with the lattice parameter a decreasing and the lattice parameter c increasing with increasing Cr concentration. The Curie temperature reached a maximum T-C=20K for 5.2% Cr. Well-defined ferromagnetic hysteresis in the magnetization and in the magnetoresistance was also observed in these films. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688043]

Original language	English
Article number	082404
Pages (from-to)	1-4
Journal	Applied Physics Letters
Volume	100
Issue number	8
DOIs	https://doi.org/10.1063/1.3688043
Publication status	Published - 2012

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title = "Ferromagnetism in thin-film Cr-doped topological insulator Bi2Se3",

abstract = "We report on the observation of ferromagnetism in epitaxial thin films of the topological insulator compound Bi2Se3 with chromium doping. The structural, magnetic, and magnetoelectrical properties of Bi2Se3 were investigated for Cr concentrations up to 10%. For a Cr content up to similar to 5% the films are of good crystalline quality, with the lattice parameter a decreasing and the lattice parameter c increasing with increasing Cr concentration. The Curie temperature reached a maximum T-C=20K for 5.2% Cr. Well-defined ferromagnetic hysteresis in the magnetization and in the magnetoresistance was also observed in these films. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688043]",

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AU - Haazen, P.P.J.

AU - Laloe, J.B.

AU - Nummy, T.J.

AU - Swagten, H.J.M.

AU - Jarillo-Herrero, P.

AU - Heiman, D.

AU - Moodera, J.S.

PY - 2012

Y1 - 2012

N2 - We report on the observation of ferromagnetism in epitaxial thin films of the topological insulator compound Bi2Se3 with chromium doping. The structural, magnetic, and magnetoelectrical properties of Bi2Se3 were investigated for Cr concentrations up to 10%. For a Cr content up to similar to 5% the films are of good crystalline quality, with the lattice parameter a decreasing and the lattice parameter c increasing with increasing Cr concentration. The Curie temperature reached a maximum T-C=20K for 5.2% Cr. Well-defined ferromagnetic hysteresis in the magnetization and in the magnetoresistance was also observed in these films. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688043]

AB - We report on the observation of ferromagnetism in epitaxial thin films of the topological insulator compound Bi2Se3 with chromium doping. The structural, magnetic, and magnetoelectrical properties of Bi2Se3 were investigated for Cr concentrations up to 10%. For a Cr content up to similar to 5% the films are of good crystalline quality, with the lattice parameter a decreasing and the lattice parameter c increasing with increasing Cr concentration. The Curie temperature reached a maximum T-C=20K for 5.2% Cr. Well-defined ferromagnetic hysteresis in the magnetization and in the magnetoresistance was also observed in these films. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688043]

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Ferromagnetism in thin-film Cr-doped topological insulator Bi2Se3

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