Annealing effect on laser-induced magnetization dynamics in Co/Ni-based synthetic antiferromagnets with perpendicular magnetic anisotropy

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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Effects of ion irradiation on epitaxial Cu/Ni/Cu(001) with perpendicular magnetic anisotropy

Applied Physics Letters ◽

10.1063/1.1515877 ◽

2002 ◽

Vol 81 (21) ◽

pp. 4017-4019 ◽

Cited By ~ 12

Author(s):

T. G. Kim ◽

Y. H. Shin ◽

J. H. Song ◽

M. C. Sung ◽

I. S. Kim ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Ion Irradiation ◽

Perpendicular Magnetic Anisotropy

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Interfacial Dzyaloshinskii-Moriya Interaction, Perpendicular Magnetic Anisotropy and damping in CoFeB/oxide-based systems

IEEE Transactions on Magnetics ◽

10.1109/tmag.2021.3088995 ◽

2021 ◽

pp. 1-1

Author(s):

I. Benguettat-El Mokhtari ◽

Y. Roussigne ◽

S. M. Cherif ◽

S. Auffret ◽

C. Baraduc ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Perpendicular Magnetic Anisotropy ◽

Moriya Interaction

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Effect of strain-induced anisotropy on magnetization dynamics in Y3Fe5O12 films recrystallized on a lattice-mismatched substrate

Scientific Reports ◽

10.1038/s41598-021-93308-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Adam Krysztofik ◽

Sevgi Özoğlu ◽

Robert D. McMichael ◽

Emerson Coy

Keyword(s):

Dispersion Model ◽

Perpendicular Magnetic Anisotropy ◽

Negative Slope ◽

Recrystallization Process ◽

Induced Anisotropy ◽

Magnetization Dynamics ◽

Unexpected Formation ◽

Lattice Matched ◽

Ferromagnetic Resonance Linewidth ◽

Lattice Mismatched Substrate

AbstractWe report on the correlation of structural and magnetic properties of Y3Fe5O12 (YIG) films deposited on Y3Al5O12 substrates using pulsed laser deposition. The recrystallization process leads to an unexpected formation of interfacial tensile strain and consequently strain-induced anisotropy contributing to the perpendicular magnetic anisotropy. The ferromagnetic resonance linewidth of YIG is significantly increased in comparison to a film on a lattice-matched Gd3Ga5O12 substrate. Notably, the linewidth dependency on frequency has a negative slope. The linewidth behavior is explained with the proposed anisotropy dispersion model.

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Local structure and magnetism of L10-type FeNi alloy films with perpendicular magnetic anisotropy studied through57Fe nuclear probes

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/48/20/205002 ◽

2015 ◽

Vol 48 (20) ◽

pp. 205002 ◽

Cited By ~ 7

Author(s):

K Mibu ◽

T Kojima ◽

M Mizuguchi ◽

K Takanashi

Keyword(s):

Magnetic Anisotropy ◽

Local Structure ◽

Perpendicular Magnetic Anisotropy ◽

Alloy Films ◽

Feni Alloy

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Route towards efficient magnetization reversal driven by voltage control of magnetic anisotropy

Scientific Reports ◽

10.1038/s41598-021-88408-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Roxana-Alina One ◽

Hélène Béa ◽

Sever Mican ◽

Marius Joldos ◽

Pedro Brandão Veiga ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Random Access ◽

Low Power Consumption ◽

Surface Anisotropy ◽

Magnetization Dynamics ◽

Storage Density ◽

Switching Regime ◽

Major Interest ◽

Out Of Plane

AbstractThe voltage controlled magnetic anisotropy (VCMA) becomes a subject of major interest for spintronics due to its promising potential outcome: fast magnetization manipulation in magnetoresistive random access memories with enhanced storage density and very low power consumption. Using a macrospin approach, we carried out a thorough analysis of the role of the VCMA on the magnetization dynamics of nanostructures with out-of-plane magnetic anisotropy. Diagrams of the magnetization switching have been computed depending on the material and experiment parameters (surface anisotropy, Gilbert damping, duration/amplitude of electric and magnetic field pulses) thus allowing predictive sets of parameters for optimum switching experiments. Two characteristic times of the trajectory of the magnetization were analyzed analytically and numerically setting a lower limit for the duration of the pulses. An interesting switching regime has been identified where the precessional reversal of magnetization does not depend on the voltage pulse duration. This represents a promising path for the magnetization control by VCMA with enhanced versatility.

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