Crystallography of Co/Pt multilayers and nanostructures

Conference · Wed Apr 01 00:00:00 EST 1992

OSTI ID:6979402

Zhang, Bing; Krishnan, K M ^[1]; Farrow, R F.C. ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. IBM Research Div., San Jose, CA (United States). Almaden Research Center

Atomically engineered nanostructures and multilayers of Co/Pt exhibit strong perpendicular anisotropy. This unique property, that determines their potential as a magneto-optic recording media, is dependent on a variety of microstructural parameters that include the overall crystallography, thickness of the layers, orientation, defect formation, interface reactions etc. A series of Co/Pt multilayer samples with different thickness of the Co layer were studied by electron diffraction. It has been determined that the Co layers persists in the fcc structure up to a thickness of 50 {Angstrom}. As the thickness is varied fmm 3{Angstrom} to 50{Angstrom} in the multilayers, the Co film gradually relaxed to its bulk lattice parameter. (111) twinning and lattice strain at the interfaces between Pt and Co layers are also observed. The symmetry forbidden reflections observed at 1/3 (224) positions in (111) zone diffraction patterns of the multilayer are due to (111) twinning and compositional modulations along the multilayer growth direction.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6979402
• Report Number(s): LBL-32290; CONF-920450-1; ON: DE92041212
• Resource Relation: Conference: 4. conference on frontiers of electron microscopy in materials science, Oakland, CA (United States), 21-24 Apr 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT
CRYSTALLOGRAPHY
ELECTRON DIFFRACTION
PLATINUM
INTERFACES
LAMELLAE
LAYERS
MAGNETO-OPTICAL EFFECTS
RECORDING SYSTEMS
THICKNESS
TWINNING
COHERENT SCATTERING
DIFFRACTION
DIMENSIONS
ELEMENTS
METALS
PLATINUM METALS
SCATTERING
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies