X-ray resonant magnetic scattering study of magnetic stripe domains in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>a</mml:mi><mml:mtext>−</mml:mtext><mml:mi mathvariant="normal">Gd</mml:mi><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow></mml:math>thin films

Miguel, J.; Peters, J.F.; Toulemonde, Olivier; Dhesi, S. S.; Brookes, N. B.; Goedkoop, J. B.

doi:10.1103/physrevb.74.094437

Cited by 29 publications

(19 citation statements)

References 45 publications

(59 reference statements)

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“…In addition, simulations show that those parameters are also the same if the system is in a state of randomly oriented labyrinthine domains. We attribute contradicting experimental observations 28,29 to the effect of pinning. 2 with applied periodic boundary conditions.…”

Section: B Extension To Stripescontrasting

confidence: 94%

Accurate model of the stripe domain phase of perpendicularly magnetized multilayers

2017

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We develop an accurate analytical model for the stray field energy of parallel stripe domains in multilayer films with perpendicular magnetic anisotropy, taking into account the effects of finite domain wall width and variable domain wall angle. By minimizing the total energy we predict the domain width, the domain wall width, and the domain wall angle for given material parameters. We show how the domain wall width depends on the film thickness and the domain size. We explore the domain wall angle as a function of Dzyaloshinskii-Moriya interaction (DMI) and derive a threshold value D thr beyond which the system is in a Néel state. We find that thicker films require larger values of DMI to stabilize the Néel state. Finally, we test the effective medium theory, which allows treating multilayers as effective single layer films and provide criteria for the applicability of the model in the presence of both surface and volume stray fields. Our results are supported by micromagnetic simulations, which indicate that the predictions are still precise even if the system is in a labyrinthine domain state. Using our model, otherwise inaccessible magnetic parameters, such as the DMI constant or the exchange constant, can now be obtained straight-forwardly from static measurements of the stripe domain width in such films.

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Section: B Extension To Stripescontrasting

confidence: 94%

Accurate model of the stripe domain phase of perpendicularly magnetized multilayers

2017

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“…7,8 This system has also been used for the technical development of high-resolution domain imaging with X-ray. 9,10 However, a systematic approach for tailoring magnetic domains has not been reported so far which paved interest for the present study. The modification in domain pattern and overall magnetic properties has been studied here.…”

Section: Introductionmentioning

confidence: 99%

Tailoring magnetic domains in Gd-Fe thin films

2018

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This paper presents the global modification of magnetic domains and magnetic properties in amorphous Gd19Fe81 thin films with rapid thermal processing at two distinct temperatures (250oC and 450oC), and with different time intervals viz., 2, 5, 10 and 20 minutes. 100 nm thick as-prepared films display nano-scale meandering stripe domains with high magnetic phase contrast which is the signature of perpendicular magnetic anisotropy. The films processed at 250oC for various time intervals show successive reduction in magnetic phase contrast and domain size. The domain pattern completely disappeared, and topography dominated mixed magnetic phase has been obtained for the films processed at 450oC for time intervals greater than 2 minutes. The magnetization measurements indicate the reduction in perpendicular magnetic anisotropy with increase in saturation magnetization for all the rapid thermal processed films. The experimental outputs have been used to simulate the domain pattern. Reduction in uniaxial anisotropy along with the increase in saturation magnetization successfully explain the experimental trend of decrease in domain size and magnetic contrast.

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“…In A similar observation, i.e., a shift of the first-order peak position to lower Q max , has been found by Hellwig et al [20] in the transition from spatially aligned to slightly disordered stripe domains. Miguel et al [19] concluded that this implies that Q max tends to overestimate the real average domain size in the disordered case. The authors suppose that the latter overestimation is the reason for the deviations in average domain size derived from magnetic force microscopy (MFM) and XRMS measurements.…”

Section: Scattering Model For the Maze Patternmentioning

confidence: 99%

“…For a well-aligned stripe pattern a model has already been published [20] in which spatial disorder is included by implementing additional cumulative Gaussian fluctuations of the domain size to explain the finite peak width of the structure factor. The maze pattern exhibits only a short-range correlation which is a striking difference to the long-range correlations of stripe domains [19,20]. Here, large variations of domain sizes have to be considered as indicated by a broad peak of the structure factor.…”

Section: Soft X-ray Resonant Magnetic Scatteringmentioning

confidence: 99%

“…Magnetic models are required for the meaningful analysis of diffraction patterns from diverse domain structures. Models exist describing the diffraction pattern of well-aligned stripe domain patterns based on a one-dimensional periodic lattice [19]. Hellwig et al [20] have presented an extended ansatz to analyze scattering patterns of moderately disordered stripe domain structures by implementing Gaussian fluctuations in the domain size.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Employing soft x-ray resonant magnetic scattering to study domain sizes and anisotropy in Co/Pd multilayers

Bagschik

Frömter

Bach³

et al. 2016

Phys. Rev. B

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It is demonstrated that the magnetic diffraction pattern of the isotropic disordered maze pattern is well described utilizing a gamma distribution of domain sizes in a one-dimensional model. From the analysis, the mean domain size and the shape parameter of the distribution are obtained. The model reveals an average domain size that is significantly different from the value that is determined from the peak position of the structure factor in reciprocal space. As a proof of principle, a wedge-shaped (Co tÅ /Pd 10Å ) 8 multilayer film, that covers the thickness range of the spin-reorientation transition, has been used. By means of soft x-ray resonant magnetic scattering (XRMS) and imaging techniques the thickness-driven evolution of the magnetic properties of the cobalt layers is explored. It is shown that minute changes of the domain pattern concerning domain size and geometry can be investigated and analyzed due to the high sensitivity and lateral resolution of the XRMS technique. The latter allows for the determination of the magnetic anisotropies of the cobalt layers within a thickness range of a few angstroms.

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X-ray resonant magnetic scattering study of magnetic stripe domains ina−GdFethin films

Cited by 29 publications

References 45 publications

Accurate model of the stripe domain phase of perpendicularly magnetized multilayers

Accurate model of the stripe domain phase of perpendicularly magnetized multilayers

Tailoring magnetic domains in Gd-Fe thin films

Employing soft x-ray resonant magnetic scattering to study domain sizes and anisotropy in Co/Pd multilayers

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