Differential Hysteresigraph using the Transverse Magneto-Optic Kerr Effect Applied to Thin Magnetic Films

1989 ◽  
Vol 150 ◽  
Author(s):  
Y. Souche ◽  
J. M. Alameda ◽  
O. Cugat ◽  
D. Givord ◽  
A. Lienard ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Magnetic Films ◽  
Thin Magnetic Films ◽  
Magneto Optic

Thickness and substrate dependence of the magneto‐optical Kerr effect of thin magnetic films

1991 ◽  
Vol 70 (10) ◽  
pp. 5858-5860 ◽  
Author(s):  
H. R. Zhai ◽  
Y. B. Xu ◽  
M. Lu ◽  
Y. Z. Miao ◽  
K. L. Hogue ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Magnetic Films ◽  
Optical Kerr Effect ◽  
Thin Magnetic Films ◽  
Substrate Dependence ◽  
Magneto Optical Kerr Effect

Theory for the Nonlinear Magneto-Optical Kerr-Effect at Ferromagnetic Transition Metal Surfaces

1993 ◽  
Vol 313 ◽  
Author(s):  
U. Pustogowa ◽  
W. Hübner ◽  
K. H. Bennemann
Keyword(s):  
Kerr Effect ◽  
Magnetic Films ◽  
Orbit Interaction ◽  
Optical Kerr Effect ◽  
Ferromagnetic Transition ◽  
Previous Theory ◽  
Thin Magnetic Films ◽  
Nonlinear Kerr Effect ◽  
Linear And Nonlinear ◽  
Magneto Optical Kerr Effect

ABSTRACTThe nonlinear Magneto-optical Kerr-effect (NMOKE) has been proven to be an ultrafast spectroscopie probe of the magnetic and electronic properties of ferromagnetic surfaces. Extending our previous theory we calculate the linear and nonlinear Magneto-optical Kerr-spectra of Fe. The results for the nonlinear Kerr spectra are compared with recent experiments on a Fe (110) surface. We derive and discuss general features of the nonlinear Kerr-effect, especially the details of its dependence on exchange interaction and Fermi-level crossings in the Stoner picture and beyond, frequency, and spin-orbit interaction. Furthermore we demonstrate how various electronic material properties, such as d-band width, s-d hybridization or band narrowing due to electronic correlations or caused by geometry (reduced coordination number in thin films), can be extracted from the spectra. As an example, we compare the linear and nonlinear Kerr-spectra of Fe to those of Ni. The extension of our theory to the Kerr spectra of thin magnetic films films as well as of hidden magnetic interfaces occurring in sandwiches and multilayers is discussed.

scholarly journals MAGNETO-OPTIC PROPERTIES AND OXIDATION/REDUCTION OF ULTRATHIN MAGNETIC FILMS: FE FILMS ON Pt(111)

2017 ◽  
Vol 24 (1&2) ◽  
pp. 107-117
Author(s):  
T.-U. Nahm
Keyword(s):  
Photoelectron Spectroscopy ◽  
Kerr Effect ◽  
Magnetic Films ◽  
No Oxidation ◽  
X Ray ◽  
Post Annealing ◽  
Oxidation Reduction ◽  
Iron Oxide Films ◽  
Magneto Optic

We have investigated magneto-optic properties of ultrathin Fe films grown on Pt(111) surfaces by using the in situ surface magneto-optic Kerr effect (SMOKE) and X-ray photoelectron spectroscopy (XPS). SMOKE measurements show that the Fe layers are not ferromagnetic when the film is thinner than approximately 4.5 MLs (monolayers), but the in-plane magnetization is present for a 4.1 ML Fe film on Pt(111) annealed at 550 K. Upon post-annealing at 770 K, a 9.2 ML Fe film does not show any Kerr signal, while a 6.3 ML Fe film has the in-plane Kerr signal with increased coercivity. The oxidation and reduction of ultrathin Fe films have also been studied by using XPS. Upon an oxygen exposure of 300 Langmuir at a film temperature of 873 K, the Fe layers were mostly oxidized as Fe3O4. When the Fe films were exposed to the same amount of oxygen at room temperature, a partial oxidation as Fe3O4 was observed for a 3 ML Fe film, while there was no oxidation for a 2 ML Fe film. On heating the 873 K oxidized films, Fe3O4O was reduced to FeO, and even the decomposition was observed. Underlying reasons for these chemical changes of Fe and iron-oxide films are discussed.

scholarly journals TMOKE as efficient tool for the magneto-optic analysis of ultra-thin magnetic films

2018 ◽  
Vol 112 (6) ◽  
pp. 063101 ◽  
Author(s):  
O. V. Borovkova ◽  
H. Hashim ◽  
M. A. Kozhaev ◽  
S. A. Dagesyan ◽  
A. Chakravarty ◽  
...  
Keyword(s):  
Magnetic Films ◽  
Efficient Tool ◽  
Thin Magnetic Films ◽  
Magneto Optic
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