Compressed exponential form for disordered domain wall motion in ultra-thin Au/Co/Au ferromagnetic films

Adjanoh, A. Adjanlété; Belhi, R.; Vogel, Jan; Ayadi, Mohamed; Abdelmoula, K.

doi:10.1016/j.jmmm.2010.10.002

Cited by 21 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3(a), it can be concluded that the magnetization reversal is dominated by domain wall motion. 21 As the time was increased the number of domain nucleation sites increases as confirmed by the domain images for h ¼ 60 shown in Figs. 4(a) and 4(b).…”

Section: Resultsmentioning

confidence: 68%

See 1 more Smart Citation

Controlling the size and relaxation dynamics of superferromagnetic domains

Chowdhury

Bedanta

Sing

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

The magnetization reversal process has been studied on a discontinuous metal-insulator multilayer sample [Co80Fe20(1.3 nm)/Al2O3(3 nm)]10 showing superferromagnetic (SFM) behavior. Size and shape of SFM domains can be changed by varying the angle θ between the magnetic field and the easy axis (EA). The magnetization reversal process along the EA is governed by domain wall motion. However, upon approaching the hard axis at increasing θ coherent rotation of superspins becomes dominant in the magnetization reversal process. This leads to the reduction of domain sizes for larger values of θ. The relaxation of magnetization has also been studied for various values of θ. We find fast relaxation along the easy axis, while the relaxation time increases for increasing θ. In general, the angular dependence of the magnetization reversal of SFM domains shows properties similar to continuous thin films.

show abstract

Section: Resultsmentioning

confidence: 68%

“…where M 0 þ M 1 is the normalized saturation magnetization, s is the relaxation time obtained from the fit, and b > 1 a compressing exponent as introduced by Adjanoh et al 21 Here, the very fast dynamics (<1 s) of the initial switching from À(M 0 þ M 1 ) to þM 0 has not been taken into account. From the fittings using Eq.…”

Section: Resultsmentioning

confidence: 99%

Controlling the size and relaxation dynamics of superferromagnetic domains

Chowdhury

Bedanta

Sing

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Here the normalized intensity as a function of time basically reflects the net magnetization relaxation of the sample. Amongst various raised models to explain magnetization relaxation phenomena Fatuzzo-Labrune model is extensively used for FM thin films [38][39][40][41][42][43]. However, the approximation of single energy barrier made in this model does not hold for a real thin film which consists of a distribution of energy barrier with defects and inhomogeneity throughout the surface.…”

Section: Relaxation Dynamicsmentioning

confidence: 99%

Strain engineered domain structure and their relaxation in perpendicularly magnetized Co/Pt deposited on flexible polyimide

et al. 2020

View full text Add to dashboard Cite

The demand of fast and power efficient spintronic devices with flexibility requires additional energy for magnetization manipulation. Stress/ strain have shown their potentials for tuning magnetic properties to the desired level. Here, we report a systematic study for the effect of both tensile and compressive stresses on the magnetic anisotropy (MA). Further the effect of stress on the domain structure and magnetization relaxation mechanism in a perpendicularly magnetized Co/Pt film has been studied. It is observed that a minimal in-plane tensile strain has increased the coercivity of the film by 33% of its initial value, while a very small change of coercivity has been found under compressive strain. The size of ferromagnetic domains decreases under tensile strain, while no change is observed under the compressive strain. Magnetization relaxation measured at sub-coercive field values yields a longer relaxation time in the strained state. OPEN ACCESS RECEIVED

show abstract

“…The last model can be rewritten in terms of the competition between domain nucleation and domain-wall (DW) motion [34,[36][37][38]:…”

Section: B Competition Between Domain Nucleation and Domain-wall Promentioning

confidence: 99%

Magnetic aftereffects in CoFeB/Ta/CoFeB spin valves of large area

et al. 2017

View full text Add to dashboard Cite

Magnetic aftereffect measurements on a synthetic antiferromagnet with strong perpendicular anisotropy are presented. Two types of magnetic transitions are observed in the CoFeB/Ta/CoFeB bilayer where the two ferromagnetic CoFeB layers are antiferromagnetically coupled: the transition from a parallel to an antiparallel CoFeB layers magnetization alignment and the transition between two possible antiparallel magnetization states. Magnetic relaxation measurements show a complete reversal in the case of the transition between the two antiferromagnetic configurations. The experimental data can be well fitted in the frame of extended exponential relaxation using the Fatuzzo-Labrune model. Consequently, the domain nucleation and domain-wall propagation can be studied as a function of temperature and applied field.

show abstract

Compressed exponential form for disordered domain wall motion in ultra-thin Au/Co/Au ferromagnetic films

Cited by 21 publications

References 23 publications

Controlling the size and relaxation dynamics of superferromagnetic domains

Controlling the size and relaxation dynamics of superferromagnetic domains

Strain engineered domain structure and their relaxation in perpendicularly magnetized Co/Pt deposited on flexible polyimide

Magnetic aftereffects in CoFeB/Ta/CoFeB spin valves of large area

Contact Info

Product

Resources

About