scholarly journals Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
P. I. Gerevenkov ◽  
D. V. Kuntu ◽  
Ia. A. Filatov ◽  
L. A. Shelukhin ◽  
M. Wang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetization Precession

Ultrafast three-dimensional magnetization precession and magnetic anisotropy of a photoexcited thin film of iron

2010 ◽  
Vol 81 (6) ◽  
Author(s):  
E. Carpene ◽  
E. Mancini ◽  
D. Dazzi ◽  
C. Dallera ◽  
E. Puppin ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetic Anisotropy ◽  
Three Dimensional ◽  
Magnetization Precession

scholarly journals Ultrafast Modulation of Magnetization Dynamics in Ferromagnetic (Ga, Mn)As Thin Films

2018 ◽  
Vol 8 (10) ◽  
pp. 1880 ◽  
Author(s):  
Hang Li ◽  
Xinhui Zhang ◽  
Xinyu Liu ◽  
Margaret Dobrowolska ◽  
Jacek Furdyna
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Dynamics ◽  
Optical Excitation ◽  
Laser Pulses ◽  
Time Resolved ◽  
Ultrafast Optical ◽  
Optical Effects ◽  
Out Of Plane ◽  
Linearly Polarized ◽  
Magnetization Precession

Magnetization precession induced by linearly polarized optical excitation in ferromagnetic (Ga,Mn)As was studied by time-resolved magneto-optical Kerr effect measurements. The superposition of thermal and non-thermal effects arising from the laser pulses complicates the analysis of magnetization precession in terms of magnetic anisotropy fields. To obtain insight into these processes, we investigated compressively-strained thin (Ga,Mn)As films using ultrafast optical excitation above the band gap as a function of pulse intensity. Data analyses with the gyromagnetic calculation based on Landau-Lifshitz-Gilbert equation combined with two different magneto-optical effects shows the non-equivalent effects of in-plane and out-of-plane magnetic anisotropy fields on both the amplitude and the frequency of magnetization precession, thus providing a handle for separating the effects of non-thermal and thermal processes in this context. Our results show that the effect of photo-generated carriers on magnetic anisotropy constitutes a particularly effective mechanism for controlling both the frequency and amplitude of magnetization precession, thus suggesting the possibility of non-thermal manipulation of spin dynamics through pulsed laser excitations.

Laser-Induced Fast Magnetization Precession and Gilbert Damping for CoCrPt Alloy Thin Films with Perpendicular Magnetic Anisotropy

2010 ◽  
Vol 3 (12) ◽  
pp. 123001 ◽  
Author(s):  
Shigemi Mizukami ◽  
Daisuke Watanabe ◽  
Takahide Kubota ◽  
Xianmin Zhang ◽  
Hiroshi Naganuma ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Gilbert Damping ◽  
Magnetization Precession

scholarly journals ION BEAM MODIFICATION OF MAGNETIC TUNNEL JUNCTIONS

2020 ◽  
Author(s):  
B. Teixeira ◽  
A. Timopheev ◽  
N. Caçoilo ◽  
S. Auffret ◽  
R. Sousa ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Ferromagnetic Resonance ◽  
Tunnel Junctions ◽  
Ion Beam ◽  
Magnetic Tunnel Junctions ◽  
High Energy ◽  
Tunneling Magnetoresistance ◽  
Ion Beam Modification ◽  
High Energy Ions ◽  
Magnetization Precession

In this work, the effect of bombardment with high-energy ions on the parameters of magnetic tunnel junctions based on CoFeB / MgO, such as magnetic anisotropy, magnetoresistance, and the damping coefficient of magnetization precession, is investigated. The modeling of the ferromagnetic resonance spectra was carried out within the framework of the Smit-Beljers and Landau-Lifshitz-Gilbert formalisms. The ion fluence limit is established, below which a controlled modulation of the magnetic anisotropy is achieved while maintaining a high tunneling magnetoresistance and stable magnetic configuration of the transition

scholarly journals Laser-induced manipulation of magnetic anisotropy and magnetization precession in an ultrathin cobalt wedge

2012 ◽  
Vol 85 (18) ◽  
Author(s):  
J. Kisielewski ◽  
A. Kirilyuk ◽  
A. Stupakiewicz ◽  
A. Maziewski ◽  
A. Kimel ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetization Precession

TEM Study of Co/Pd and Co/Au Multilayers

1993 ◽  
Vol 51 ◽  
pp. 1036-1037
Author(s):  
A.E.M. De Veirman ◽  
F.J.G. Hakkens ◽  
W.M.J. Coene ◽  
F.J.A. den Broeder
Keyword(s):  
Magnetic Anisotropy ◽  
Ion Beam ◽  
Perpendicular Magnetic Anisotropy ◽  
Optical Recording ◽  
Magnetic Multilayer ◽  
Ion Beam Sputtering ◽  
Cross Sectional ◽  
Transmission Electron ◽  
Beam Sputtering ◽  
Substrate Temperatures

There is currently great interest in magnetic multilayer (ML) thin films (see e.g.), because they display some interesting magnetic properties. Co/Pd and Co/Au ML systems exhibit perpendicular magnetic anisotropy below certain Co layer thicknesses, which makes them candidates for applications in the field of magneto-optical recording. It has been found that the magnetic anisotropy of a particular system strongly depends on the preparation method (vapour deposition, sputtering, ion beam sputtering) as well as on the substrate, underlayer and deposition temperature. In order to get a better understanding of the correlation between microstructure and properties a thorough cross-sectional transmission electron microscopy (XTEM) study of vapour deposited Co/Pd and Co/Au (111) MLs was undertaken (for more detailed results see ref.).The Co/Pd films (with fixed Pd thickness of 2.2 nm) were deposited on mica substrates at substrate temperatures Ts of 20°C and 200°C, after prior deposition of a 100 nm Pd underlayer at 450°C.

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