scholarly journals Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching

2019 ◽  
Vol 100 (2) ◽  
Author(s):  
Y. Quessab ◽  
M. Deb ◽  
J. Gorchon ◽  
M. Hehn ◽  
G. Malinowski ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Optical Switching ◽  
Magnetic Circular Dichroism ◽  
All Optical ◽  
Circular Dichroïsm ◽  
All Optical Switching

scholarly journals Micromagnetic Modeling of All Optical Switching of Ferromagnetic Thin Films: The Role of Inverse Faraday Effect and Magnetic Circular Dichroism

2020 ◽  
Vol 10 (4) ◽  
pp. 1307 ◽  
Author(s):  
Victor Raposo ◽  
Rodrigo Guedas ◽  
Felipe García-Sánchez ◽  
M. Auxiliadora Hernández ◽  
Marcelino Zazo ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Switching ◽  
Faraday Effect ◽  
Magnetic Circular Dichroism ◽  
Laser Pulses ◽  
Inverse Faraday Effect ◽  
Ferromagnetic Thin Films ◽  
All Optical ◽  
Circular Dichroïsm ◽  
All Optical Switching

There is a lot of experimental evidence of All Optical Switching (AOS) by applying ultrashort laser pulses on ferromagnetic thin films with perpendicular magnetic anisotropy. However, the physical origin behind these processes remains under debate. In addition to the heating caused by the laser pulses, the Inverse Faraday Effect (IFE) and Magnetic Circular Dichroism (MCD) have been proposed as the most probable phenomena responsible for the observations of helicity-dependent AOS. Here, we review the influence of both phenomena by means of realistic micromagnetic simulations based on the Landau–Lifshitz–Bloch equation coupled to the heat transport caused by the laser heating. The analysis allows us to reveal the similarities and differences between both effects. While both mechanisms may lead to the local inversion of the initial magnetic state of a ferromagnetic sample submitted to a train of circularly polarized laser pulses, the Inverse Faraday Effect proves to be more efficient for nucleation and domain wall movement and it reproduces more accurately the different magnetic configurations that the experiments report for different values of the fluence of the laser beam.

scholarly journals Role of Magnetic Circular Dichroism in All-Optical Magnetic Recording

2012 ◽  
Vol 108 (12) ◽  
Author(s):  
A. R. Khorsand ◽  
M. Savoini ◽  
A. Kirilyuk ◽  
A. V. Kimel ◽  
A. Tsukamoto ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Magnetic Recording ◽  
Magnetic Circular Dichroism ◽  
All Optical ◽  
Circular Dichroïsm

Critical Role of Capping Layer in Determining Co−Fe−B/MgO Interfacial Magnetism Revealed by X-Ray Magnetic Circular Dichroism

2020 ◽  
Vol 14 (5) ◽  
Author(s):  
James Lourembam ◽  
Xiaojiang Yu ◽  
Maria Patricia Rouelli Sabino ◽  
Michael Tran ◽  
Roslyn Wan Teng Ang ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Magnetic Circular Dichroism ◽  
Critical Role ◽  
Capping Layer ◽  
X Ray ◽  
Circular Dichroïsm

scholarly journals Role of element-specific damping in ultrafast, helicity-independent, all-optical switching dynamics in amorphous (Gd,Tb)Co thin films

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Alejandro Ceballos ◽  
Akshay Pattabi ◽  
Amal El-Ghazaly ◽  
Sergiu Ruta ◽  
Christian P. Simon ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Switching ◽  
Switching Dynamics ◽  
All Optical ◽  
All Optical Switching
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