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Author Kawakami, R. K. ♦ Escorcia-Aparicio, E. J. ♦ Qiu, Z. Q.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ COBALT ♦ THIN FILMS ♦ IRON ♦ EXCHANGE INTERACTIONS ♦ FCC LATTICES ♦ MOLECULAR BEAM EPITAXY ♦ MAGNETIC PROPERTIES ♦ THICKNESS ♦ INTERFACES ♦ SANDWICH STRUCTURES
Abstract Ferromagnetic (FC) and antiferromagnetic coupling (AFC) of Co layers across a metastable fcc Fe spacer layer has been observed. Room-temperature-grown Fe on Co/Cu(100) was chosen as a spacer layer because it exhibits three distinct structural and magnetic phases depending on the thickness range: fct and ferromagnetic (region I), fcc and nonferromagnetic (region II), bcc and ferromagnetic (region III) (listed in order of increasing thickness). Co/Fe/Co sandwiches were grown on Cu(100) by molecular beam epitaxy with a base pressure of {approximately}2{times}10{sup {minus}10} Torr, and characterized by low-energy electron diffraction and reflection high-energy electron diffraction. The magnetic properties were studied {ital in} {ital situ} using surface magneto-optic Kerr effect. Using a wedged Fe spacer layer, we investigated the magnetic coupling between Co films across many thicknesses of Fe. We found FC in region I, strong AFC at the boundary between regions I and II, and weak AFC in region II. We also studied the effect of just the Co overlayer on the metastable fcc Fe. We find that Co/Fe/Cu(100) differs qualitatively from Fe/Co/Cu(100). Finally, we find an oscillation in the AFC with a periodicity of {approximately}12 A by artificially increasing the thickness range of region II. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Department Lawrence Berkeley National Laboratory
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 79
Issue Number 8
Technical Publication No. CONF-951101-
Organization Lawrence Berkeley National Laboratory


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