Extended longitudinal vector and Bragg magneto-optic Kerr effect for the determination of the chirality distribution in magnetic vortices

2008 ◽  
Vol 103 (9) ◽  
pp. 093913 ◽  
Author(s):  
Min-Sang Lee ◽  
Andreas Westphalen ◽  
Arndt Remhof ◽  
Alexandra Schumann ◽  
Harmut Zabel
Keyword(s):  
Kerr Effect ◽  
Magnetic Vortices ◽  
Magneto Optic

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.

scholarly journals Determination of the magnetization profile of Co/Mg periodic multilayers by magneto-optic Kerr effect and X-ray magnetic resonant reflectivity

2013 ◽  
Vol 417 ◽  
pp. 012025
Author(s):  
P Jonnard ◽  
K Le Guen ◽  
J-M André ◽  
R Delaunay ◽  
N Mahne ◽  
...  
Keyword(s):  
Kerr Effect ◽  
X Ray ◽  
Magneto Optic

Determination of Intrinsic Magnetic Parameters of SmCo5 Phase in Sintered Samples

2005 ◽  
Vol 498-499 ◽  
pp. 129-133 ◽  
Author(s):  
Marcos Flavio de Campos ◽  
Fernando José Gomes Landgraf
Keyword(s):  
Powder Metallurgy ◽  
Domain Wall ◽  
Kerr Effect ◽  
Critical Diameter ◽  
Optical Microscope ◽  
Domain Theory ◽  
Magnetic Domains ◽  
Magnetic Parameters ◽  
Intrinsic Parameters

SmCo5 magnets are usually produced by powder metallurgy route, including milling, compaction and orientation under magnetic field, sintering and heat treatment. The samples produced by powder metallurgy, with grain size around 10 μm, are ideal for determination of intrinsic parameters. The first step for determination of intrinsic magnetic parameters is obtaining images of domain structure in demagnetized samples. In the present study, the domain images were produced by means of Kerr effect, in a optical microscope. After the test of several etchings, Nital appears as the most appropriate for observation of magnetic domains by Kerr effect. Applying Stereology and Domain Theory, several intrinsic parameters of SmCo5 phase were determined: domain wall energy 120 erg/cm2, critical diameter for single domain particle size 2 μm and domain wall thickness 60 Å. In the case of SmCo5, and also other phases with high magnetocrystalline anisotropy, Domain Theory presents several advantages when compared with Micromagnetics.

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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