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Observations show that the X-ray emission of the accreting weakly magnetized neutron stars is polarized. Here, we develop a theoretical model, where we assume the emission of the accreting neutron star coming from the spreading layer, the…

High Energy Astrophysical Phenomena · Physics 2025-05-06 Anna Bobrikova , Juri Poutanen , Vladislav Loktev

Based on Brown's static equations of micromagnetics, we compute the uniaxial polarization of the scattered neutron beam of a bulk magnetic material. The theoretical expressions are compared to experimental data on a soft magnetic…

Materials Science · Physics 2022-01-19 A. Malyeyev , I. Titov , C. D. Dewhurst , K. Suzuki , D. Honecker , A. Michels

Recent studies of the self-assembly of Langmuir monolayers have revealed novel forms of lateral molecular ordering. Such studies typically involve the use of grazing-incidence synchrotron radiation scattering, and the lateral order…

Soft Condensed Matter · Physics 2025-09-25 L. R. Muftakhova , K. V. Nikolaev , A. V. Rogachev , N. N. Novikova , B. I. Ostrovskii , S. N. Yakunin

Neutron reflectometry is a critical tool for investigating the structure of thin films and interfaces. However, the misapplication of the Born approximation to reflection geometry leads some to assume that the minimum thickness that may be…

Soft Condensed Matter · Physics 2024-03-21 Nicolas Shiaelis , Luke A. Clifton , Andrew R. McCluskey

We report on an Edge Illumination setup enabling neutron dark-field imaging where two amplitude modulators are used to structure and subsequently analyze the neutron beam. The modulator and analyzer are manufactured by laser ablation of…

Instrumentation and Detectors · Physics 2020-06-23 Marco Endrizzi , Gibril K. Kallon , Triestino Minniti , Rolf Broennimann , Alessandro Olivo

Polarized small-angle neutron scattering (PSANS) experimental results obtained on arrays of ferromagnetic Co nanowires ($\phi\approx13$ nm) embedded in self-organized alumina (Al$_{2}$O$_{3}$) porous matrices are reported. The triangular…

Neutron elastic diffuse scattering experiments performed on Pb(Zn1/3Nb2/3)O3 (PZN) and on its solid solution with PbTiO3(PT), known as PZN-xPT, with x=4.5% and 9% around many reflections show that diffuse scattering is observed around…

Materials Science · Physics 2009-11-07 D. La-Orauttapong , J. Toulouse , Z. -G. Ye , W. Chen , R. Erwin , J. L. Robertson

The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a Si substrate have been investigated using depth-controlled $\beta$-detected nuclear magnetic resonance. A low energy beam of spin polarized radioactive…

We present the depth-resolved nuclear resonance reflectivity (NRR) studies of the magnetization evolution in [57Fe(3 nm)/Cr(1.2 nm)]*10 multilayer under the applied external field. The measurements have been performed at the station BL09XU…

Mesoscale and Nanoscale Physics · Physics 2018-03-28 M. Andreeva , A. Gupta , G. Sharma , S. Kamali , K. Okada , Y. Yoda

Polar magnetism is present when ions occupy sites that are not centres of inversion symmetry. Fortunately, such magnetization contributes to neutron scattering that is the bedrock of magnetic structure determinations. Experiments in which…

Strongly Correlated Electrons · Physics 2022-08-31 S. W. Lovesey

We have tested the new experimental techniques in the M\"ossbauer spectroscopy with Synchrotron M\"ossbauer Source by using the polarization analysis of the reflected radiation. In particular we have shown that the dichroic components in…

Mesoscale and Nanoscale Physics · Physics 2018-03-28 Marina Andreeva , Roman Baulin , Aleksandr Chumakov , Tatiyana Kiseleva , Rudolf Rüffer

A method for specular reflection of polar molecules is proposed. Electrostatatic potentials and forces are calculated for a low-field-seeking molecule near a series of long cylindrical electrodes of radius $r$ with dc potentials of $+V$ and…

The intense magnetic fields of neutron stars naturally lead to strong anisotropy and polarization of radiation emanating from their surfaces, both being sensitive to the hot spot position on the surface. Accordingly, pulse phase-resolved…

High Energy Astrophysical Phenomena · Physics 2025-02-21 Matthew G. Baring , Hoa Dinh Thi , George A. Younes , Kun Hu

Isolated Neutron Stars are known to be endowed with extreme magnetic fields, whose maximum intensity ranges from 10^12 to 10^15 G, which permeates their magnetospheres. Their surrounding environment is also strongly magnetised, especially…

High Energy Astrophysical Phenomena · Physics 2018-02-01 R. P. Mignani

A polystyrene film spun onto polished silicon substrates was implanted with either nitrogen or argon ions using plasma immersion ion implantation (PIII) and subsequently investigated by X-ray and neutron reflectometry, UV-VIS and FTIR…

Chemical Physics · Physics 2012-04-11 S Dekker , A Kondyurin , B Steel , M M M Bilek , D R McKenzie , M James

Magnetic torque is used to actuate nano-torsional resonators, which are fabricated by focused-ion-beam milling of permalloy coated silicon nitride membranes. Optical interferometry is used to measure the mechanical response of two torsion…

Mesoscale and Nanoscale Physics · Physics 2010-03-09 J. P. Davis , D. Vick , D. C. Fortin , J. A. J. Burgess , W. K. Hiebert , M. R. Freeman

We report on self-assembled iron oxide nanoparticle films on silicon substrates. In addition to homogeneously assembled layers, we fabricated patterned trenches of 40-1000 nm width using electron beam lithography for the investigation of…

Mesoscale and Nanoscale Physics · Physics 2010-10-21 M. J. Benitez , P. Szary , D. Mishra , M. Feyen , A. H. Lu , O. Petracic , H. Zabel

In polarimetry it is important to characterize the polarization properties of the instrument itself to disentangle real astrophysical signals from instrumental effects. This article deals with the accurate measurement and modeling of the…

Instrumentation and Methods for Astrophysics · Physics 2015-05-13 G. van Harten , F. Snik , C. U. Keller

Nanoscale surface analysis of 1 micrometer thick high entropy alloys (HEAs) was carried out using nano-IR for hyperspectral imaging and single point spectroscopy in the 700-1700 1/cm spectral range. Nano-IR is based on the detection of…

This chapter describes the synthesis and some characteristics of magnetic iron oxide nanoparticles, mainly nanocubes, and focus on their self-assembly into crystalline cuboids in dispersion. The influence of external magnetic fields, the…

Soft Condensed Matter · Physics 2019-01-09 Sabine Rosenfeldt , Stephan Förster , Thomas Friedrich , Ingo Rehberg , Birgit Weber
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