Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films

J. Y. Kim; J. H. Park; B. G. Park; H. J. Noh; S. J. Oh; J. S. Yang; D. H. Kim; S. D. Bu; T. W. Noh; H. J. Lin; H. H. Hsieh; C. T. Chen

Ferromagnetism induced by clustered Co in Co-doped anatase TiO₂ thin films

J. Y. Kim
, J. H. Park^*
, B. G. Park
, H. J. Noh
, S. J. Oh
, J. S. Yang
, D. H. Kim
, S. D. Bu
, T. W. Noh
, H. J. Lin
, H. H. Hsieh
, C. T. Chen

^*Corresponding author for this work

Department of Physics

Pohang University of Science and Technology
Seoul National University
National Synchrotron Radiation Research Center Taiwan

Research output: Contribution to journal › Journal article › peer-review

394 Scopus citations

Abstract

The origin of ferromagnetism in Co-doped anatase TiO₂ films was studied using the x-ray magnetic circular dichroism at the Co L_2,3 edges. The substituted Co has a high spin Co²⁺ as in CoO, but the magnetic signal, which contributes to ∼0.1μ_B/Co in average, was found to be identical to that of Co metal, showing that the magnetic origin is a partial amount of clustered Co. The magnetic signal was enhanced greatly with thermal treatments, and the magnetic moment reached up to ∼1.55μ_B/Co, indicating that most of Co becomes clustered during the postannealing process.

Original language	English
Article number	017401
Pages (from-to)	017401/1-017401/4
Journal	Physical Review Letters
Volume	90
Issue number	1
State	Published - 2003.01.10

Cite this

@article{afe014d4b70b4be494e52371c05d111e,

title = "Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films",

abstract = "The origin of ferromagnetism in Co-doped anatase TiO2 films was studied using the x-ray magnetic circular dichroism at the Co L2,3 edges. The substituted Co has a high spin Co2+ as in CoO, but the magnetic signal, which contributes to ∼0.1μB/Co in average, was found to be identical to that of Co metal, showing that the magnetic origin is a partial amount of clustered Co. The magnetic signal was enhanced greatly with thermal treatments, and the magnetic moment reached up to ∼1.55μB/Co, indicating that most of Co becomes clustered during the postannealing process.",

author = "Kim, \{J. Y.\} and Park, \{J. H.\} and Park, \{B. G.\} and Noh, \{H. J.\} and Oh, \{S. J.\} and Yang, \{J. S.\} and Kim, \{D. H.\} and Bu, \{S. D.\} and Noh, \{T. W.\} and Lin, \{H. J.\} and Hsieh, \{H. H.\} and Chen, \{C. T.\}",

year = "2003",

month = jan,

day = "10",

language = "English",

volume = "90",

pages = "017401/1--017401/4",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "1",

}

TY - JOUR

T1 - Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films

AU - Kim, J. Y.

AU - Park, J. H.

AU - Park, B. G.

AU - Noh, H. J.

AU - Oh, S. J.

AU - Yang, J. S.

AU - Kim, D. H.

AU - Bu, S. D.

AU - Noh, T. W.

AU - Lin, H. J.

AU - Hsieh, H. H.

AU - Chen, C. T.

PY - 2003/1/10

Y1 - 2003/1/10

N2 - The origin of ferromagnetism in Co-doped anatase TiO2 films was studied using the x-ray magnetic circular dichroism at the Co L2,3 edges. The substituted Co has a high spin Co2+ as in CoO, but the magnetic signal, which contributes to ∼0.1μB/Co in average, was found to be identical to that of Co metal, showing that the magnetic origin is a partial amount of clustered Co. The magnetic signal was enhanced greatly with thermal treatments, and the magnetic moment reached up to ∼1.55μB/Co, indicating that most of Co becomes clustered during the postannealing process.

AB - The origin of ferromagnetism in Co-doped anatase TiO2 films was studied using the x-ray magnetic circular dichroism at the Co L2,3 edges. The substituted Co has a high spin Co2+ as in CoO, but the magnetic signal, which contributes to ∼0.1μB/Co in average, was found to be identical to that of Co metal, showing that the magnetic origin is a partial amount of clustered Co. The magnetic signal was enhanced greatly with thermal treatments, and the magnetic moment reached up to ∼1.55μB/Co, indicating that most of Co becomes clustered during the postannealing process.

UR - https://www.scopus.com/pages/publications/0037428611

M3 - Journal article

AN - SCOPUS:0037428611

SN - 0031-9007

VL - 90

SP - 017401/1-017401/4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 017401

ER -

Ferromagnetism induced by clustered Co in Co-doped anatase TiO₂ thin films

Abstract

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