Scanning magneto-optical Kerr effect (MOKE) measurement with element-selectivity by using a soft x-ray free-electron laser and an ellipsoidal mirror

2020 ◽  
Vol 117 (4) ◽  
pp. 042405
Author(s):  
Yuya Kubota ◽  
Hiroto Motoyama ◽  
Gota Yamaguchi ◽  
Satoru Egawa ◽  
Yoko Takeo ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Kerr Effect ◽  
Optical Kerr Effect ◽  
X Ray ◽  
Ellipsoidal Mirror ◽  
Magneto Optical Kerr Effect

Femtosecond resonant magneto-optical Kerr effect measurement on an ultrathin magnetic film in a soft X-ray free electron laser

2018 ◽  
Vol 57 (9S2) ◽  
pp. 09TD02 ◽  
Author(s):  
Shingo Yamamoto ◽  
Yuya Kubota ◽  
Kohei Yamamoto ◽  
Yoshinobu Takahashi ◽  
Kohei Maruyama ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Kerr Effect ◽  
Magnetic Film ◽  
Effect Measurement ◽  
Optical Kerr Effect ◽  
X Ray ◽  
Magneto Optical Kerr Effect

Study of Interfaces in Hf/Fe System Using Magneto‐Optical Kerr Effect and Soft X‐Ray Absorption Spectroscopy

2020 ◽  
Vol 14 (11) ◽  
pp. 2000177
Author(s):  
Pramod Vishwakarma ◽  
Mukul Gupta ◽  
Varimalla R. Reddy ◽  
Deodatta M. Phase ◽  
Ajay Gupta
Keyword(s):  
Absorption Spectroscopy ◽  
Kerr Effect ◽  
Optical Kerr Effect ◽  
X Ray ◽  
Magneto Optical Kerr Effect ◽  
X Ray Absorption

TRANSVERSE MAGNETO-OPTICAL KERR EFFECT IN THE SOFT X-RAY REGIME OF ULTRATHIN IRON FILMS AND ISLANDS ON W(110)

2002 ◽  
Vol 09 (02) ◽  
pp. 913-919 ◽  
Author(s):  
V. SENZ ◽  
A. KLEIBERT ◽  
J. BANSMANN
Keyword(s):  
Kerr Effect ◽  
Three Dimensional ◽  
Magnetic Behavior ◽  
Optical Kerr Effect ◽  
Easy Magnetization ◽  
Iron Films ◽  
X Ray ◽  
Linearly Polarized ◽  
Magneto Optical Kerr Effect ◽  
Island System

The transverse magneto-optical Kerr effect (T-MOKE) in the soft X-ray regime is used to investigate the magnetic properties of ultrathin epitaxial Fe(110) films and thermally created epitaxial Fe islands on W(110). The measurements have been carried out at the Fe 2p core levels with tunable, linearly polarized synchrotron radiation. Besides the chemical selectivity T-MOKE at core levels is characterized by a much larger sensitivity compared to the visible regime. We have analyzed the transition from thin films to a three-dimensional island system at a thickness of 4 ML and the magnetic behavior when increasing the iron coverage to 8 ML. The Fe island system is characterized by a rotation of the easy magnetization axis in this coverage regime.

scholarly journals Soft X-RAY Magnetic Scattering Study of thin Films and Multilayers

1991 ◽  
Vol 231 ◽  
Author(s):  
C.-C. Kao ◽  
E.D. Johnson ◽  
J.B. Hastings ◽  
D.P. Siddons ◽  
C. Vettier
Keyword(s):  
Kerr Effect ◽  
Faraday Effect ◽  
Magnetic Circular Dichroism ◽  
Magnetic Scattering ◽  
Optical Kerr Effect ◽  
Scattering Process ◽  
Resonant Enhancement ◽  
X Ray ◽  
Scattering Study ◽  
Magneto Optical Kerr Effect

AbstractA brief discussion of the resonant magnetic scattering process is given. Results from recent studies of thin Fe films and Fe/Gd multilayers are used as examples to demonstrate the information can be obtained and the unique features of this technique: large resonant enhancement, sensitivity to magnitization, elemental specificity, and tunability of the penetration depth. Comparison is made with related techniques: magneto-optical Kerr effect, Faraday effect, and magnetic circular dichroism.

scholarly journals Intense sub-micrometre focusing of soft X-ray free-electron laser beyond 1016 W cm−2 with an ellipsoidal mirror

2019 ◽  
Vol 26 (5) ◽  
pp. 1406-1411 ◽  
Author(s):  
Hiroto Motoyama ◽  
Shigeki Owada ◽  
Gota Yamaguchi ◽  
Takehiro Kume ◽  
Satoru Egawa ◽  
...  
Keyword(s):  
Photon Energy ◽  
Free Electron ◽  
High Intensity ◽  
Free Electron Laser ◽  
Numerical Aperture ◽  
Saturable Absorption ◽  
X Ray ◽  
High Numerical Aperture ◽  
Ellipsoidal Mirror ◽  
Drastic Increase

Intense sub-micrometre focusing of a soft X-ray free-electron laser (FEL) was achieved by using an ellipsoidal mirror with a high numerical aperture. A hybrid focusing system in combination with a Kirkpatrick–Baez mirror was applied for compensation of a small spatial acceptance of the ellipsoidal mirror. With this system, the soft X-ray FEL pulses were focused down to 480 nm × 680 nm with an extremely high intensity of 8.8×1016 W cm−2 at a photon energy of 120 eV, which yielded saturable absorption at the L-edge of Si (99.8 eV) with a drastic increase of transmittance from 8% to 48%.

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