Microscopic reversal behavior of magnetically capped nanospheres

Günther, C. M.; Hellwig, Olav; Menzel, Andreas; Pfau, Bastian; Radu, F.; Makarov, Denys; Albrecht, Manfred; Goncharov, Alexander V.; Schrefl, T.; Schlotter, W. F.; Rick, R.; Lüning, J.; Eisebitt, Stefan

doi:10.1103/physrevb.81.064411

Cited by 45 publications

(26 citation statements)

References 25 publications

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“…The technique is particularly suited to imaging magnetic domains and other magnetic samples because holograms generated with circularly polarized X-rays can be used to separate charge scattering from magnetic scattering [3][4][5] . X-ray holography has developed into a powerful single measurement technique 1,6 and has promising applications using X-ray lasers to study structures of radiation-sensitive samples and the structural changes of transient phenomena [6][7][8] .…”

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confidence: 99%

X-ray holography with a customizable reference

et al. 2014

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In X-ray Fourier-transform holography, images are formed by exploiting the interference pattern between the X-rays scattered from the sample and a known reference wave. To date, this technique has only been possible with a limited set of special reference waves. We demonstrate X-ray Fourier-transform holography with an almost unrestricted choice for the reference wave, permitting experimental geometries to be designed according to the needs of each experiment and opening up new avenues to optimize signal-to-noise and resolution. The optimization of holographic references can aid the development of holographic techniques to meet the demands of resolution and fidelity required for single-shot imaging applications with X-ray lasers.

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confidence: 99%

X-ray holography with a customizable reference

et al. 2014

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“…The beamline provides photons with variable polarization and energy especially in the range covering the L 3,2 edges of the 3d transition metal elements. Therefore it is ideally suited for magnetic studies, be it absorption measurements, reflectivity studies [18] or holography experiments [19,20]. During single bunch operation mode the repetition frequency of the electron bunches is 1.25 MHz with a pulse length of 50 ps, enabling pump-probe type experiments for processes much faster than 800 ns, i.e.…”

Section: Methodsmentioning

confidence: 99%

Precessional damping of Fe magnetic moments in a FeNi film

Buschhorn¹,

Brüssing²,

Abrudan³

et al. 2011

J. Phys. D: Appl. Phys.

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Abstract. We report on the element-resolved precessional dynamics of Fe magnetic moments in a homogeneous FeNi thin film. In our pump-probe experiment the magnetic system is excited by a magnetic field pulse from a stripline. The instantaneous response to the field pulse excitation is monitored as a function of time in a stroboscopic measurement using element selective X-ray Resonant Magnetic Scattering (XRMS). Our data show that Fe and Ni moments are aligned parallel to each other at all times, while they oscillate around the effective field direction given by the step field pulse and applied bias field. The field dependence of the precessional motion and damping of Fe magnetic moments is analyzed and compared to time-resolved Magneto-Optical Kerr Effect (tr-MOKE) measurement data from literature, showing good agreement. Additional studies proove the capability of our setup to conduct temperature dependent studies. In case of the presented FeNi system no changes in the frequency or damping behavior are observed within a temperature range of 150 − 350 K.

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“…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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Microscopic reversal behavior of magnetically capped nanospheres

Cited by 45 publications

References 25 publications

X-ray holography with a customizable reference

X-ray holography with a customizable reference

Precessional damping of Fe magnetic moments in a FeNi film

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

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