High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-doped ${\mathrm{S}\mathrm{n}\mathrm{O}}_{2\ensuremath{-}\ensuremath{\delta}}$

High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-doped ${S n O}_{2 - δ}$

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

Phys. Rev. Lett. 91, 077205 – Published 15 August 2003

Abstract

The occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of ${S n}_{1 - x} {C o}_{x} O_{2 - δ}$ ( $x < 0.3$ ). Interestingly, films of ${S n}_{0.95} {C o}_{0.05} O_{2 - δ}$ grown on $R$ -plane sapphire not only exhibit ferromagnetism with a Curie temperature close to 650 K, but also a giant magnetic moment of $7.5 \pm 0.5 μ_{B} / C o$ , not yet reported in any diluted magnetic semiconductor system. The films are semiconducting and optically highly transparent.

Received 16 January 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.077205

Authors & Affiliations

S. B. Ogale^1,*, R. J. Choudhary¹, J. P. Buban², S. E. Lofland³, S. R. Shinde¹, S. N. Kale¹, V. N. Kulkarni^1,†, J. Higgins¹, C. Lanci³, J. R. Simpson⁴, N. D. Browning², S. Das Sarma⁴, H. D. Drew⁴, R. L. Greene¹, and T. Venkatesan¹

¹Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA
²Department of Physics, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7059, USA
³Department of Chemistry and Physics, Rowan University, Glassboro, New Jersey 08028-1701, USA
⁴Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA

^*Electronic address: ogale@squid.umd.edu
^†On leave from Indian Institute of Technology, Kanpur, India.

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Vol. 91, Iss. 7 — 15 August 2003

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Physical Review Letters

High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-doped SnO2−δ

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

Phys. Rev. Lett. 91, 077205 – Published 15 August 2003

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High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-doped ${S n O}_{2 - δ}$