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Curie temperature of ferromagnetic (Ga,Mn)N epitaxial films
Author(s) -
Lee J. M.,
Ham M. H.,
Myoung J. M.,
Chang J. Y.,
Han S. H.,
Lee W. Y.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304607
Subject(s) - curie temperature , ferromagnetism , condensed matter physics , molecular beam epitaxy , magnetization , epitaxy , atmospheric temperature range , materials science , hall effect , chemistry , magnetic field , analytical chemistry (journal) , nanotechnology , physics , thermodynamics , layer (electronics) , quantum mechanics , chromatography
Abstract Electron‐mediated ferromagnetism persisting to room temperature has been investigated in epitaxial (Ga,Mn)N films with low Mn concentration grown by plasma‐enhanced molecular beam epitaxy (PEMBE).The experimental value of T C (∼325 K) in the (Ga,Mn)N film with x = 0.3% from the difference (Δ M ) between field‐cooled (FC) and zero field‐cooled (ZFC) magnetization curves is found to be lower than the estimated value of T C (∼407 K), obtained by the mean field approximations. The extra‐ordinary Hall effect in the epitaxial (Ga,Mn)N film with x = 0.2% is found to appear in the temperature range 100 K–300 K. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)