Polarized neutron reflection study of the unidirectional magnetic anisotropy of permalloy on Ni{sub 0.5}Co{sub 0.5}O

Conference · Sat Aug 01 00:00:00 EDT 1992

OSTI ID:10187775

Felcher, G P; Huang, Y Y ^[1]; Carey, M; Berkowitz, A ^[2]

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1. Argonne National Lab., IL (United States)
2. California Univ., San Diego, La Jolla, CA (United States). Center for Magnetic Recording Research

Couples of ferromagnetic permalloy/antiferromagnetic metal oxide exhibit unidirectional magnetic anisotropy along a magnetic field applied during cooling. Polarized neutron reflection has been used to check if the effect is due to a bias of the antiferromagnetic configuration in the oxide, where the layer immediately adjacent to the permalloy is polarized parallel to the easy direction of magnetization. The measurements were made on a sample consisting of permalloy/500{Angstrom} Ni{sub 0.05}Co{sub 0.5}O. The polarized neutron reflectivities taken at the four corners of the magnetic hysteresis loop at 20K. A faint magnetic signal consistent with the unidirectional bias of the F/AF structure is also observed. This behavior is discussed in the light of the current theories.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10187775
• Report Number(s): ANL/CP-76028; CONF-9209227-3; ON: DE93000509; CNN: Grant DMR-90-10908
• Resource Relation: Conference: Symposium on magnetic ultrathin films, multilayers, and surfaces,Lyon (France),7-10 Sep 1992; Other Information: PBD: Aug 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PERMALLOY
MAGNETIC PROPERTIES
NICKEL OXIDES
COBALT OXIDES
LAYERS
ANISOTROPY
ANTIFERROMAGNETISM
POLARIZED BEAMS
NEUTRON BEAMS
REFLECTION
TEMPERATURE RANGE 0013-0065 K
360104
360204
PHYSICAL PROPERTIES