Spatially resolved measurement technique of magnetic anisotropy fields using the magneto‐optic Kerr effect

1990 ◽  
Vol 67 (9) ◽  
pp. 5938-5940 ◽  
Author(s):  
C. S. Gudeman ◽  
D. Mauri
Keyword(s):  
Magnetic Anisotropy ◽  
Measurement Technique ◽  
Kerr Effect ◽  
Spatially Resolved ◽  
Magneto Optic

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.

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.

Direct measurement of magnon temperature by magneto-optic Kerr effect in YIG

2021 ◽  
Author(s):  
fayuan zhang ◽  
Yuxi Qiao ◽  
Jiajia Wang ◽  
Wenjing Liu ◽  
Shan Qiao
Keyword(s):  
Kerr Effect ◽  
Thermal Relaxation ◽  
Relaxation Length ◽  
Spatially Resolved ◽  
Spin Seebeck Effect ◽  
The Difference ◽  
Iron Garnet ◽  
Insight Into ◽  
Magneto Optic

Abstract Magnon-phonon thermal relaxation holds a fundamental role in condensed matter physics, and the difference between local phonon and magnon temperature ΔTmp as an important part of this subfield was theoretically considered responsible for the spin Seebeck effect. Experimental determination of ΔTmp is necessary to give more insight into magnon-phonon coupling. Here we report spatially resolved measurements of magnon temperature performed by magneto-optic Kerr effect in yttrium iron garnet. Our results indicate a strong interaction between magnon and phonon subsystems in YIG with an upper limit of the phonon-magnon thermal relaxation length of 1.4 mm, and means this method is valid.

Giant resonant magneto-optic Kerr effect in nanostructured ferromagnetic metamaterials

2007 ◽  
Vol 102 (12) ◽  
pp. 123514 ◽  
Author(s):  
Alexander A. Zharov ◽  
Vladislav V. Kurin
Keyword(s):  
Kerr Effect ◽  
Magneto Optic
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