Magnetic states in low-pinning high-anisotropy material nanostructures suitable for dynamic imaging

Büttner, Felix; Moutafis, Christoforos; Bisig, André; Wohlhüter, Phillip; Günther, C. M.; Mohanty, J.; Geilhufe, Jan; Schneider, Martin; Schmising, C. vonKorff; Schaffert, S.; Pfau, Bastian; Hantschmann, Markus; Riemeier, M.; Emmel, M.; Finizio, Simone; Jakob, G.; Weigand, Markus; Rhensius, Jan; Franken, JH Jeroen; Lavrijsen, Reinoud; Swagten, Hjm Henk; Stoll, Hermann; Eisebitt, Stefan; Kläui, Mathias

doi:10.1103/physrevb.87.134422

Cited by 18 publications

(15 citation statements)

References 37 publications

(50 reference statements)

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“…An example is a Pt(2)/[Co 68 B 32 (0.4)/Pt(0.7)] 30 / Pt(1.3) (thickness in nm) magnetic multilayer with M s = 1.19(3) × 10 6 A/m and ∆ 0 = 11(2) nm, which has been used in the investigation of domain dynamics. 1,8 Entering this into our calculation, we find that the transverse anisotropy constant is given by 0.07(2)µ 0 M 2 s . This value is a factor seven smaller than predicted by the simple and widely used formula K ⊥ = µ 0 M 2 s /2 and a factor 1.7 smaller than predicted by the thin film formula…”

Section: Applicationsmentioning

confidence: 99%

“…where the superscript (1) denotes the partial derivative with respect to s at s = 0. We will hence derive a formula to calculate the magnetostatic energy σ …”

Section: General Equationsmentioning

confidence: 99%

“…In the following, we calculate the magnetostatic energy density σ d and, in particular, the first order partial derivative σ (1) d . We consider a thin film multilayer system of length L (x-direction) and width W (y-direction) in the limit L, W → ∞, which is a reasonably accurate approximation if L, W ∆ 0 .…”

Section: Magnetostatic Energy Densitymentioning

confidence: 99%

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Accurate calculation of the transverse anisotropy of a magnetic domain wall in perpendicularly magnetized multilayers

et al. 2015

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The transverse anisotropy constant and the related Döring mass density are key parameters of the one-dimensional model to describe the motion of magnetic domain walls. So far, no general framework is available to determine these quantities from static characterizations such as magnetometry measurements. Here, we derive a universal analytical expression to calculate the transverse anisotropy constant for the important class of perpendicular magnetic multilayers. All the required input parameters of the model, such as the number of repeats, the thickness of a single magnetic layer, and the layer periodicity, as well as the effective perpendicular anisotropy, the saturation magnetization, and the static domain wall width are accessible by static sample characterizations. We apply our model to a widely used multilayer system and find that the effective transverse anisotropy constant is a factor 7 different from the when using the conventional approximations, showing the importance of using our analysis scheme.

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Section: Applicationsmentioning

confidence: 99%

“…where the superscript (1) denotes the partial derivative with respect to s at s = 0. We will hence derive a formula to calculate the magnetostatic energy σ …”

Section: General Equationsmentioning

confidence: 99%

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Accurate calculation of the transverse anisotropy of a magnetic domain wall in perpendicularly magnetized multilayers

et al. 2015

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“…This integrated mask design monolithically couples the source of the reference wave to the object to be imaged and generates the remarkable stability of FTH against drift and vibration during exposure. Since no optical elements are blocking the space around the integrated mask, FTH provides flexibility to realize a variety of sample environments [26,27] and in particular the possibility to easily reach the sample with an optical pump [28]. In addition, the off-axis geometry of the reference wave source from the object effectively spatially separates the twin-images occurring in the hologram reconstruction.…”

Section: Theorymentioning

confidence: 99%

“…In addition, the off-axis geometry of the reference wave source from the object effectively spatially separates the twin-images occurring in the hologram reconstruction. Due to these advantages and its simple experimental design, FTH with X-rays is routinely applied in numerous experiments such as relating to imaging nanomagnetic structures [26][27][28][29][30][31][32] or biological specimen [7,13,21,33].…”

Section: Theorymentioning

confidence: 99%

Extracting depth information of 3-dimensional structures from a single-view X-ray Fourier-transform hologram

Geilhufe¹,

Tieg²,

Pfau³

et al. 2014

Opt. Express

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Extracting depth information of 3-dimensional structures from a single-view X-ray Fourier-transform hologramGeilhufe, J.; Tieg, C.; Pfau, Bastian; Guenther, C. M.; Guehrs, E.; Schaffert, S.; Eisebitt, Stefan General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract: We demonstrate how information about the three-dimensional structure of an object can be extracted from a single Fourier-transform Xray hologram. In contrast to lens-based 3D imaging approaches that provide depth information of a specimen utilizing several images from different angles or via adjusting the focus to different depths, our method capitalizes on the use of the holographically encoded phase and amplitude information of the object's wavefield. It enables single-shot measurements of 3D objects at coherent X-ray sources. As the ratio of longitudinal resolution over transverse resolution scales proportional to the diameter of the reference beam aperture over the X-ray wavelength, we expect the approach to be particularly useful in the extreme ultraviolet and soft-X-ray regime. Extracting depth information of 3-dimensional structures from a single-view X-ray

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Electrical nucleation and detection of magnetic skyrmions

Büttner

Legrand

2021

Magnetic Skyrmions and Their Applications

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Magnetic states in low-pinning high-anisotropy material nanostructures suitable for dynamic imaging

Cited by 18 publications

References 37 publications

Accurate calculation of the transverse anisotropy of a magnetic domain wall in perpendicularly magnetized multilayers

Accurate calculation of the transverse anisotropy of a magnetic domain wall in perpendicularly magnetized multilayers

Extracting depth information of 3-dimensional structures from a single-view X-ray Fourier-transform hologram

Electrical nucleation and detection of magnetic skyrmions

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