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Epitaxial growth of Fe on GaN(0001): structural and magnetic properties
Author(s) -
Calarco R.,
Meijers R.,
Kaluza N.,
Guzenko V. A.,
Thillosen N.,
Schäpers Th.,
Lüth H.,
Fonin M.,
Krzyk S.,
Ghadimi R.,
Beschoten B.,
Güntherodt G.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200461297
Subject(s) - coercivity , epitaxy , molecular beam epitaxy , materials science , metalorganic vapour phase epitaxy , scanning tunneling microscope , evaporation , electron beam physical vapor deposition , hysteresis , electron diffraction , condensed matter physics , analytical chemistry (journal) , diffraction , thin film , nanotechnology , chemistry , optics , layer (electronics) , chromatography , thermodynamics , physics
We report results on growth studies of Fe on GaN, in particular with respect to structural and magnetic properties. The growth of GaN has been carried out by molecular beam epitaxy (MBE) and metal organic vapour phase epitaxy (MOVPE) on Si(111) and Al 2 O 3 substrates, respectively. Fe depositions of different thicknesses were performed in ultra high vacuum (UHV) at room temperature using an electron‐beam evaporation set‐up. X‐ray diffraction analysis shows that the iron films are crystalline and indications of a (110) bcc orientation of the film are observed. By means of scanning tunneling microscopy (STM) epitaxial islands of Fe on the GaN(0001) surface, on a scale of 500 × 500 nm 2 , have been observed. The experimentally determined magnetic hysteresis loops, with the magnetic field applied parallel to the sample surface, show a coercive field that decreases as the temperature increases; at 300 K and 50 K we measure a coercive field of 12 G and 36 G, respectively. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)