Ferromagnetism in laser deposited anatase (formula presented) films

S. R. Shinde; S. B. Ogale; S. Das Sarma; J. R. Simpson; H. D. Drew; S. E. Lofland; C. Lanci; J. P. Buban; N. D. Browning; V. N. Kulkarni; J. Higgins; R. P. Sharma; R. L. Greene; T. Venkatesan

doi:10.1103/PhysRevB.67.115211

Ferromagnetism in laser deposited anatase (formula presented) films

S. R. Shinde, S. B. Ogale, S. Das Sarma, J. R. Simpson, H. D. Drew, S. E. Lofland, C. Lanci, J. P. Buban, N. D. Browning, V. N. Kulkarni, J. Higgins, R. P. Sharma, R. L. Greene, T. Venkatesan

Physics

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Abstract

Pulsed laser deposited films of Co-doped anatase (formula presented) are examined for Co substitutionality, ferromagnetism, transport, magnetotransport, and optical properties. Our results show limited solubility (up to ∼2%) of Co in the as-grown films and formation of Co clusters thereafter. For the (formula presented) sample, which exhibits a Curie temperature (formula presented) over 1180 K, we find the presence of 20–50 nm Co clusters as well as a small concentration of Co incorporated into the remaining matrix. After being subjected to the high-temperature anneal during the first magnetization measurement, the very same sample shows a (formula presented) and almost full matrix incorporation of Co. This (formula presented) is close to that of as-grown (formula presented) sample (∼700 K). The transport, magnetotransport, and optical studies also reveal interesting effects of the matrix incorporation of Co. These results are indicative of an intrinsic (formula presented) diluted magnetic semiconductor with (formula presented) of about 650–700 K.

Original language	English (US)
Pages (from-to)	6
Number of pages	1
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.67.115211
State	Published - 2003

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Shinde, S. R., Ogale, S. B., Das Sarma, S., Simpson, J. R., Drew, H. D., Lofland, S. E., Lanci, C., Buban, J. P., Browning, N. D., Kulkarni, V. N., Higgins, J., Sharma, R. P., Greene, R. L., & Venkatesan, T. (2003). Ferromagnetism in laser deposited anatase (formula presented) films. Physical Review B - Condensed Matter and Materials Physics, 67(11), 6. https://doi.org/10.1103/PhysRevB.67.115211

Shinde, S. R. ; Ogale, S. B. ; Das Sarma, S. ; Simpson, J. R. ; Drew, H. D. ; Lofland, S. E. ; Lanci, C. ; Buban, J. P. ; Browning, N. D. ; Kulkarni, V. N. ; Higgins, J. ; Sharma, R. P. ; Greene, R. L. ; Venkatesan, T. / Ferromagnetism in laser deposited anatase (formula presented) films. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 67, No. 11. pp. 6.

@article{25b72e159a984e0b9df1c9d24074146d,

title = "Ferromagnetism in laser deposited anatase (formula presented) films",

abstract = "Pulsed laser deposited films of Co-doped anatase (formula presented) are examined for Co substitutionality, ferromagnetism, transport, magnetotransport, and optical properties. Our results show limited solubility (up to ∼2%) of Co in the as-grown films and formation of Co clusters thereafter. For the (formula presented) sample, which exhibits a Curie temperature (formula presented) over 1180 K, we find the presence of 20–50 nm Co clusters as well as a small concentration of Co incorporated into the remaining matrix. After being subjected to the high-temperature anneal during the first magnetization measurement, the very same sample shows a (formula presented) and almost full matrix incorporation of Co. This (formula presented) is close to that of as-grown (formula presented) sample (∼700 K). The transport, magnetotransport, and optical studies also reveal interesting effects of the matrix incorporation of Co. These results are indicative of an intrinsic (formula presented) diluted magnetic semiconductor with (formula presented) of about 650–700 K.",

author = "Shinde, {S. R.} and Ogale, {S. B.} and {Das Sarma}, S. and Simpson, {J. R.} and Drew, {H. D.} and Lofland, {S. E.} and C. Lanci and Buban, {J. P.} and Browning, {N. D.} and Kulkarni, {V. N.} and J. Higgins and Sharma, {R. P.} and Greene, {R. L.} and T. Venkatesan",

year = "2003",

doi = "10.1103/PhysRevB.67.115211",

language = "English (US)",

volume = "67",

pages = "6",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "11",

}

Shinde, SR, Ogale, SB, Das Sarma, S, Simpson, JR, Drew, HD, Lofland, SE, Lanci, C, Buban, JP, Browning, ND, Kulkarni, VN, Higgins, J, Sharma, RP, Greene, RL & Venkatesan, T 2003, 'Ferromagnetism in laser deposited anatase (formula presented) films', Physical Review B - Condensed Matter and Materials Physics, vol. 67, no. 11, pp. 6. https://doi.org/10.1103/PhysRevB.67.115211

Ferromagnetism in laser deposited anatase (formula presented) films. / Shinde, S. R.; Ogale, S. B.; Das Sarma, S.; Simpson, J. R.; Drew, H. D.; Lofland, S. E.; Lanci, C.; Buban, J. P.; Browning, N. D.; Kulkarni, V. N.; Higgins, J.; Sharma, R. P.; Greene, R. L.; Venkatesan, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 11, 2003, p. 6.

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

TY - JOUR

T1 - Ferromagnetism in laser deposited anatase (formula presented) films

AU - Shinde, S. R.

AU - Ogale, S. B.

AU - Das Sarma, S.

AU - Simpson, J. R.

AU - Drew, H. D.

AU - Lofland, S. E.

AU - Lanci, C.

AU - Buban, J. P.

AU - Browning, N. D.

AU - Kulkarni, V. N.

AU - Higgins, J.

AU - Sharma, R. P.

AU - Greene, R. L.

AU - Venkatesan, T.

PY - 2003

Y1 - 2003

N2 - Pulsed laser deposited films of Co-doped anatase (formula presented) are examined for Co substitutionality, ferromagnetism, transport, magnetotransport, and optical properties. Our results show limited solubility (up to ∼2%) of Co in the as-grown films and formation of Co clusters thereafter. For the (formula presented) sample, which exhibits a Curie temperature (formula presented) over 1180 K, we find the presence of 20–50 nm Co clusters as well as a small concentration of Co incorporated into the remaining matrix. After being subjected to the high-temperature anneal during the first magnetization measurement, the very same sample shows a (formula presented) and almost full matrix incorporation of Co. This (formula presented) is close to that of as-grown (formula presented) sample (∼700 K). The transport, magnetotransport, and optical studies also reveal interesting effects of the matrix incorporation of Co. These results are indicative of an intrinsic (formula presented) diluted magnetic semiconductor with (formula presented) of about 650–700 K.

AB - Pulsed laser deposited films of Co-doped anatase (formula presented) are examined for Co substitutionality, ferromagnetism, transport, magnetotransport, and optical properties. Our results show limited solubility (up to ∼2%) of Co in the as-grown films and formation of Co clusters thereafter. For the (formula presented) sample, which exhibits a Curie temperature (formula presented) over 1180 K, we find the presence of 20–50 nm Co clusters as well as a small concentration of Co incorporated into the remaining matrix. After being subjected to the high-temperature anneal during the first magnetization measurement, the very same sample shows a (formula presented) and almost full matrix incorporation of Co. This (formula presented) is close to that of as-grown (formula presented) sample (∼700 K). The transport, magnetotransport, and optical studies also reveal interesting effects of the matrix incorporation of Co. These results are indicative of an intrinsic (formula presented) diluted magnetic semiconductor with (formula presented) of about 650–700 K.

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U2 - 10.1103/PhysRevB.67.115211

DO - 10.1103/PhysRevB.67.115211

M3 - Article

AN - SCOPUS:84979218223

VL - 67

SP - 6

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 11

ER -

Ferromagnetism in laser deposited anatase (formula presented) films

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