scholarly journals All-optical switching in granular ferromagnets caused by magnetic circular dichroism

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Matthew O. A. Ellis ◽  
Eric E. Fullerton ◽  
Roy W. Chantrell
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

scholarly journals Soft x-ray absorption spectroscopy and magnetic circular dichroism as operando probes of complex oxide electrolyte gate transistors

2020 ◽  
Vol 116 (20) ◽  
pp. 201905
Author(s):  
Biqiong Yu ◽  
Guichuan Yu ◽  
Jeff Walter ◽  
Vipul Chaturvedi ◽  
Joseph Gotchnik ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
Complex Oxide ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm ◽  
Oxide Electrolyte
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