High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">n</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>
Satishchandra OgaleCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742-4111, USAR. J. ChoudharyCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAJ. P. BubanDepartment of Physics, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7059, USAS. E. LoflandDepartment of Chemistry and Physics, Rowan University, Glassboro, New Jersey 08028-1701, USAS. R. ShindeCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAS. N. KaleCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAV. N. KulkarniCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAJ. S. HigginsCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAC. LanciDepartment of Chemistry and Physics, Rowan University, Glassboro, New Jersey 08028-1701, USAJ. R. SimpsonDepartment of Physics, University of Maryland, College Park, Maryland 20742-4111, USANigel D. BrowningDepartment of Physics, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7059, USAS. Das SarmaDepartment of Physics, University of Maryland, College Park, Maryland 20742-4111, USAH. D. DrewDepartment of Physics, University of Maryland, College Park, Maryland 20742-4111, USAR. L. GreeneCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAT. VenkatesanCenter for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA
2003lv
ABI
Аннотация
The occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of ${\mathrm{S}\mathrm{n}}_{1\ensuremath{-}x}{\mathrm{C}\mathrm{o}}_{x}{\mathrm{O}}_{2\ensuremath{-}\ensuremath{\delta}}$ ($x<0.3$). Interestingly, films of ${\mathrm{S}\mathrm{n}}_{0.95}{\mathrm{C}\mathrm{o}}_{0.05}{\mathrm{O}}_{2\ensuremath{-}\ensuremath{\delta}}$ grown on $R$-plane sapphire not only exhibit ferromagnetism with a Curie temperature close to 650 K, but also a giant magnetic moment of $7.5\ifmmode\pm\else\textpm\fi{}0.5{\ensuremath{\mu}}_{B}/\mathrm{C}\mathrm{o}$, not yet reported in any diluted magnetic semiconductor system. The films are semiconducting and optically highly transparent.
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