Ultrahigh vacuum SQUID magnetometry study of the magnetic properties of Co/Co-oxide thin films
- Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (United States)
- Quantum Design Inc., San Diego, California 92121 (United States)
Exchange coupling between Co and Co-oxide in bilayer and trilayer thin-film structures has been studied using a recently developed ultrahigh vacuum SQUID magnetometer (UHVSQM) system. Using this novel technique, newly deposited Co films from a separate molecular beam epitaxy facility were transported into the UHVSQM without breaking vacuum and magnetically characterized before and after {ital in} {ital situ} room temperature oxidation. Field-cooled hysteresis measurements performed at low temperatures indicate the presence of a complex antiferromagnetic Co-oxide domain structure as a result of oxidation. The stability of the magnetic structure is determined by competition between frustration generated at the interface when the ferromagnetic Co moments are reversed and stabilizing antiferromagnetic anisotropy which becomes large only at low temperatures ({lt}150 K). {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 280019
- Report Number(s):
- CONF-951101-; ISSN 0021-8979; TRN: 9608M0073
- Journal Information:
- Journal of Applied Physics, Vol. 79, Issue 8; Conference: 40. conference on magnetism and magnetic materials, Philadelphia, PA (United States), 6-9 Nov 1995; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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