In Situ Rheed and Magneto-Optic Study of Ultrathin Cobalt Films on (111) Gold Substrate: Effect of a Metallic Overlayer

1993 ◽  
Vol 313 ◽  
Author(s):  
Ould-Mahfoud S ◽  
Megy R. ◽  
Bardou N. ◽  
Bartenlian B. ◽  
Beauvillain P. ◽  
...  
Keyword(s):  
Coercive Force ◽  
Magnetic Anisotropy ◽  
Kerr Effect ◽  
Effect Study ◽  
Ultrathin Film ◽  
Substrate Effect ◽  
Gold Substrate ◽  
Cobalt Films ◽  
Magneto Optic

ABSTRACTWe present a comparative in situ RHEED and Polar Magneto-optic Kerr Effect study of the first stages of the growth of a Au overlayer on top of a (111) Co ultrathin film. Drastic behaviours are evidenced on the RHEED diagram, Magnetic anisotropy and coercive force, around 1,5 ML of Au coverage.

Misfit Strain Relief Beyond the Critical Thickness Using Curvature Measurements and in Situ Characterization of the Magneto-Optic Kerr Effect

1994 ◽  
Vol 356 ◽  
Author(s):  
H. E. Inglefield ◽  
G. Bochi ◽  
C. A. Ballentine ◽  
R. C. O’Handley ◽  
C. V. Thompson
Keyword(s):  
Film Thickness ◽  
Magnetic Anisotropy ◽  
Kerr Effect ◽  
Critical Thickness ◽  
Misfit Strain ◽  
Misfit Dislocations ◽  
Wafer Curvature ◽  
Curvature Measurements ◽  
Magneto Optic

AbstractEpitaxial misfit has been characterized in Ni/Cu/Si (100) as a function of Ni film thickness using wafer curvature measurements. This strain can be related to measurements of magnetic anisotropy made in the deposition system using the magneto-optic Kerr effect. Films were deposited using molecular beam epitaxy (MBE) with varying Ni epilayer thickness between 10 and 1000Å. The change in wafer curvature due to misfit strain was measured using optical interferometry and the strain was calculated using Stoney’s equation. Transmission electron microscopy was used to characterize misfit dislocations at the Ni/Cu interface. It has been determined that misfit strain can have a very strong effect on magnetic anisotropy, particularly in the regime between the critical thickness and complete misfit accommodation, where strain has been found to decrease significantly as a function of film thickness. A critical strain has been determined at which a transition in the direction of magnetization easy axis from perpendicular to the film to in the film plane occurs. This discovery allows the use of Kerr effect measurements to characterize misfit strain in situ.

Magneto-optical-Kerr-effect study of spin-polarized quantum-well states in a Au overlayer on a Co(0001) ultrathin film

1995 ◽  
Vol 51 (8) ◽  
pp. 5586-5589 ◽  
Author(s):  
R. Mégy ◽  
A. Bounouh ◽  
Y. Suzuki ◽  
P. Beauvillain ◽  
P. Bruno ◽  
...  
Keyword(s):  
Quantum Well ◽  
Kerr Effect ◽  
Effect Study ◽  
Ultrathin Film ◽  
Optical Kerr Effect ◽  
Spin Polarized ◽  
Magneto Optical Kerr Effect ◽  
Quantum Well States

Use of Magneto-Optic Kerr Effect Measurements to Study Strain and Misfit Accommodation in Thin Films of Ni/Cu (100)

1993 ◽  
Vol 308 ◽  
Author(s):  
H.E. Inglefield ◽  
C.A. Ballentine ◽  
G. Bochi ◽  
S.S. Bogomolov ◽  
R.C. O'Handley ◽  
...  
Keyword(s):  
Thin Films ◽  
Kerr Effect ◽  
Molecular Beam ◽  
Magnetic Thin Films ◽  
Fringe Analysis ◽  
High Resolution Tem ◽  
Kinetics Of ◽  
Misfit Accommodation ◽  
Magneto Optic

ABSTRACTWe have detected magnetic transitions in Ni/Cu (100) films as a function of Ni thickness through in situ measurements of the magneto-optic Kerr effect (MOKE). Crystalline quality was monitored using in situ RHEED and Auger electron spectroscopy. Films were deposited by molecular beam epitaxy on silicon wafers and cleaved sodium chloride with varying epitaxial Ni layer thicknesses between 10 and 200 A. High-resolution TEM images of these films indicate decreasing misfit dislocation spacing and decreasing strain as measured by moiré fringe analysis with increasing Ni thickness. These observations have been correlated with changes in magnetic anisotropy as measured by MOKE. MOKE, therefore, may provide a tool for in situ monitoring of the kinetics of misfit accommodation in magnetic thin films.

scholarly journals In situ electromagnet with active cooling for real-time magneto-optic Kerr effect spectroscopy

2021 ◽  
Vol 92 (2) ◽  
pp. 025105
Author(s):  
A. Brozyniak ◽  
G. Mendirek ◽  
M. Hohage ◽  
A. Navarro-Quezada ◽  
P. Zeppenfeld
Keyword(s):  
Real Time ◽  
Kerr Effect ◽  
Active Cooling ◽  
Magneto Optic

In situ magneto-optical Kerr effect study of uncovered Fe films on ZnSe(001)

2005 ◽  
Vol 294 (2) ◽  
pp. e105-e109 ◽  
Author(s):  
P.L. Gastelois ◽  
M.D. Martins ◽  
L.H.F. Andrade ◽  
V.H. Etgens ◽  
W.A.A. Macedo
Keyword(s):  
Kerr Effect ◽  
Effect Study ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect
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