Bulk and surface magnetization of Co atoms in rutile Ti 1-xCoxO2-δ thin films revealed by x-ray magnetic circular dichroism

V. R. Singh; Y. Sakamoto; T. Kataoka; M. Kobayashi; Y. Yamazaki; A. Fujimori; F. H. Chang; D. J. Huang; H. J. Lin; C. T. Chen; H. Toyosaki; T. Fukumura; M. Kawasaki

doi:10.1088/0953-8984/23/17/176001

Bulk and surface magnetization of Co atoms in rutile Ti _1-xCo_xO_2-δ thin films revealed by x-ray magnetic circular dichroism

V. R. Singh, Y. Sakamoto, T. Kataoka, M. Kobayashi, Y. Yamazaki, A. Fujimori, F. H. Chang, D. J. Huang, H. J. Lin, C. T. Chen, H. Toyosaki, T. Fukumura, M. Kawasaki

Advanced Institute for Materials Research (AIMR)

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

18 Citations (Scopus)

Abstract

We have studied magnetism in Ti_{1 - x}Co_xO _{2 - δ} thin films with various x and δ by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L_{2, 3} absorption edges. The estimated ferromagnetic moment by XMCD was 0.15-0.24μ_B/Co at the surface, while in the bulk it was 0.82-2.25μ_B/Co, which is in the same range as the saturation magnetization of 1.0-1.5μ_B/Co. These results suggest an intrinsic origin of the ferromagnetism. The smaller moment of the Co atom at the surface is an indication of a magnetically dead layer of a few nanometers thick at the surface of the thin films.

Original language	English
Article number	176001
Journal	Journal of Physics Condensed Matter
Volume	23
Issue number	17
DOIs	https://doi.org/10.1088/0953-8984/23/17/176001
Publication status	Published - 2011 May 4

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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Singh, V. R., Sakamoto, Y., Kataoka, T., Kobayashi, M., Yamazaki, Y., Fujimori, A., Chang, F. H., Huang, D. J., Lin, H. J., Chen, C. T., Toyosaki, H., Fukumura, T., & Kawasaki, M. (2011). Bulk and surface magnetization of Co atoms in rutile Ti _1-xCo_xO_2-δ thin films revealed by x-ray magnetic circular dichroism. Journal of Physics Condensed Matter, 23(17), [176001]. https://doi.org/10.1088/0953-8984/23/17/176001

Singh, VR, Sakamoto, Y, Kataoka, T, Kobayashi, M, Yamazaki, Y, Fujimori, A, Chang, FH, Huang, DJ, Lin, HJ, Chen, CT, Toyosaki, H, Fukumura, T & Kawasaki, M 2011, 'Bulk and surface magnetization of Co atoms in rutile Ti _1-xCo_xO_2-δ thin films revealed by x-ray magnetic circular dichroism', Journal of Physics Condensed Matter, vol. 23, no. 17, 176001. https://doi.org/10.1088/0953-8984/23/17/176001

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title = "Bulk and surface magnetization of Co atoms in rutile Ti 1-xCoxO2-δ thin films revealed by x-ray magnetic circular dichroism",

abstract = "We have studied magnetism in Ti1 - xCoxO 2 - δ thin films with various x and δ by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2, 3 absorption edges. The estimated ferromagnetic moment by XMCD was 0.15-0.24μB/Co at the surface, while in the bulk it was 0.82-2.25μB/Co, which is in the same range as the saturation magnetization of 1.0-1.5μB/Co. These results suggest an intrinsic origin of the ferromagnetism. The smaller moment of the Co atom at the surface is an indication of a magnetically dead layer of a few nanometers thick at the surface of the thin films.",

author = "Singh, {V. R.} and Y. Sakamoto and T. Kataoka and M. Kobayashi and Y. Yamazaki and A. Fujimori and Chang, {F. H.} and Huang, {D. J.} and Lin, {H. J.} and Chen, {C. T.} and H. Toyosaki and T. Fukumura and M. Kawasaki",

year = "2011",

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doi = "10.1088/0953-8984/23/17/176001",

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T1 - Bulk and surface magnetization of Co atoms in rutile Ti 1-xCoxO2-δ thin films revealed by x-ray magnetic circular dichroism

AU - Singh, V. R.

AU - Sakamoto, Y.

AU - Kataoka, T.

AU - Kobayashi, M.

AU - Yamazaki, Y.

AU - Fujimori, A.

AU - Chang, F. H.

AU - Huang, D. J.

AU - Lin, H. J.

AU - Chen, C. T.

AU - Toyosaki, H.

AU - Fukumura, T.

AU - Kawasaki, M.

PY - 2011/5/4

Y1 - 2011/5/4

N2 - We have studied magnetism in Ti1 - xCoxO 2 - δ thin films with various x and δ by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2, 3 absorption edges. The estimated ferromagnetic moment by XMCD was 0.15-0.24μB/Co at the surface, while in the bulk it was 0.82-2.25μB/Co, which is in the same range as the saturation magnetization of 1.0-1.5μB/Co. These results suggest an intrinsic origin of the ferromagnetism. The smaller moment of the Co atom at the surface is an indication of a magnetically dead layer of a few nanometers thick at the surface of the thin films.

AB - We have studied magnetism in Ti1 - xCoxO 2 - δ thin films with various x and δ by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2, 3 absorption edges. The estimated ferromagnetic moment by XMCD was 0.15-0.24μB/Co at the surface, while in the bulk it was 0.82-2.25μB/Co, which is in the same range as the saturation magnetization of 1.0-1.5μB/Co. These results suggest an intrinsic origin of the ferromagnetism. The smaller moment of the Co atom at the surface is an indication of a magnetically dead layer of a few nanometers thick at the surface of the thin films.

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Bulk and surface magnetization of Co atoms in rutile Ti _1-xCo_xO_2-δ thin films revealed by x-ray magnetic circular dichroism

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