Room-temperature observation of high-spin polarization of epitaxial CrO2(100) island films at the Fermi energy | Zendy

Yu. S. Dedkov | Zendy; M. Fonin | Zendy; C. König | Zendy; U. Rüdiger | Zendy; G. Güntherodt | Zendy; Stephan Senz | Zendy; D. Hesse | Zendy

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Room-temperature observation of high-spin polarization of epitaxial CrO2(100) island films at the Fermi energy

Author(s) -

Yu. S. Dedkov,

M. Fonin,

C. König,

U. Rüdiger,

G. Güntherodt,

Stephan Senz,

D. Hesse

Publication year - 2002

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1482142

Subject(s) - spin polarization , condensed matter physics , scanning tunneling microscope , epitaxy , photoemission spectroscopy , fermi level , materials science , annealing (glass) , chemical vapor deposition , spin polarized scanning tunneling microscopy , thin film , scanning tunneling spectroscopy , electron , x ray photoelectron spectroscopy , optoelectronics , nuclear magnetic resonance , nanotechnology , physics , layer (electronics) , quantum mechanics , composite material

Epitaxial CrO2(100) island films have been grown on TiO2(100) substrates by a chemical-vapor deposition technique. Well-controlled surface and interface properties of the CrO2(100) films were confirmed by scanning tunneling microscopy and transmission electron microscopy, respectively. Spin- and angle-resolved photoemission spectroscopy at room temperature revealed an energy gap of about 2 eV below Fermi level EF for spin-down electrons and a spin polarization of about +95% at EF. After extended sputtering, the spin polarization can be recovered from about +10% up to +85% upon annealing.

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