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$F$-state interference significantly modifies the polarization produced by scattering processes in the solar atmosphere. Its signature in the emergent Stokes spectrum in the absence of magnetic fields is depolarization in the line core. In…

Solar and Stellar Astrophysics · Physics 2015-12-25 K. Sowmya , K. N. Nagendra , J. O. Stenflo , M. Sampoorna

The crystal structure and magnetic properties of YCo$_5$ compound have been studied by neutron diffraction, in the pressure range $0 \le p \le 7.2 \ GPa$. The experimental data are analyzed together with results from the combined Density…

Strongly Correlated Electrons · Physics 2018-06-13 E. Burzo , P. Vlaic , D. P. Kozlenko , N. O. Golosova , S. E. Kichanov , B. N. Savenko , A. Östlin , L. Chioncel

To enhance the reflectivity of X-ray mirrors beyond the critical angle, multilayer coatings are required. Interface imperfections in the multilayer growth process are known to cause non-specular scattering and degrade the mirror optical…

Optics · Physics 2013-04-05 B. Salmaso , D. Spiga , R. Canestrari , L. Raimondi

Single crystals of Nd$_2$O$_3$ were grown and characterized using neutron scattering and thermodynamic measurements. Nd$_2$O$_3$ has long-range antiferromagnetic order below $T_{\rm N}$ = 0.55 K and specific heat measurements have…

Strongly Correlated Electrons · Physics 2020-08-25 Binod K. Rai , A. D. Christianson , G. Sala , M. B. Stone , Y. Liu , A. F. May

We discuss the magnetic excitations of well-ordered stripe and checkerboard phases, including the high energy magnetic excitations of recent interest and possible connections to the "resonance peak" in cuprate superconductors. Using a…

Superconductivity · Physics 2007-05-23 D. X. Yao , E. W. Carlson , D. K. Campbell

The physical characterisation and understanding of molecular magnetic materials is one of the most important steps towards the integration of such systems in hybrid spintronic devices. Amongst the many characterisation techniques employed…

Mesoscale and Nanoscale Physics · Physics 2021-01-18 Simon Ansbro , Eufemio Moreno-Pineda , Wen Yu , Jacques Ollivier , Hannu Mutka , Mario Ruben , Alessandro Chiesa

In the presence of strong magnetic fields, the vacuum becomes a birefringent medium. We show that this QED effect decouples the polarization modes of photons leaving the NS surface. Both the total intensity and the intensity in each of the…

Astrophysics · Physics 2009-11-07 Jeremy S. Heyl , Nir J. Shaviv , Don Lloyd

In this work, we studied the local structure and the magnetization of Co4N thin films deposited by a reactive dc magnetron sputtering process. The interstitial incorporation of N atoms in a fcc Co lattice is expected to expand the structure…

Materials Science · Physics 2018-03-14 Nidhi Pandey , Mukul Gupta , Rachana Gupta , Parasmani Rajput , Jochen Stahn

The effects of magnetisation forces in a binary mixture of gases characterised by large differences in magnetic susceptibility are studied using numerical simulations, with a focus on the differential diffusion of the species and the role…

Fluid Dynamics · Physics 2026-01-09 Alexander C. Kruse , Pavlos G. Aleiferis , Andrea Giusti

We study the onset of neutron drip in high density matter in the presence of magnetic field. It has been found that for systems having only protons and electrons, in the presence of magnetic field >~ 10^{15}G, the neutronization occurs at a…

Solar and Stellar Astrophysics · Physics 2015-06-19 M. V. Vishal , Banibrata Mukhopadhyay

This work numerically investigates the radiative properties of film-coupled metamaterials made of a two-dimensional metallic concave grating on a continuous metal film separated by an ultrathin dielectric spacer. Spectrally-selective…

Optics · Physics 2014-12-11 Hao Wang , Liping Wang

In this paper, we systematically calculate the polarization in soft X-rays emitted from magnetized neutron stars, which are expected to be observed by the next-generation X-ray satellites. Magnetars are one of the targets for these…

High Energy Astrophysical Phenomena · Physics 2017-12-13 Akihiro Yatabe , Shoichi Yamada

Extremely strong magnetic fields change the vacuum index of refraction. Although this polarization dependent effect is small for typical neutron stars, it is large enough to decouple the polarization states of photons traveling within the…

Astrophysics · Physics 2009-10-31 Jeremy S. Heyl , Nir J. Shaviv

We report on the properties of SrTb2O4, a frustrated zigzag ladder antiferromagnet, studied by single crystal neutron diffraction (with polarised neutrons in zero field and unpolarised neutrons in an applied magnetic field), as well as by…

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…

We investigated the magnetic structure of the antiferromagnetic (AFM) ordered state ($T_{\rm N} \sim$ 34 K) in tetragonal UPt$_{2}$Si$_{2}$ using polarized and unpolarized neutron diffraction. Previous neutron scattering studies reported…

Strongly Correlated Electrons · Physics 2024-04-05 Fusako Kon , Chihiro Tabata , Hiraku Saito , Taro Nakajima , Hiroyuki Hidaka , Tatsuya Yanagisawa Hiroshi Amitsuka

We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields in the quantum disordered phase and at…

Polarized neutron reflectometry (PNR) provides evidence that nonlocal electrodynamics governs the magnetic field penetration in an extreme low-k superconductor. The sample is an indium film with a large elastic mean free path (11 mkm)…

We discuss torsional oscillations of highly magnetised neutron stars (magnetars) using two-dimensional, magneto-elastic-hydrodynamical simulations. Our model is able to explain both the low- and high-frequency quasi-periodic oscillations…

High Energy Astrophysical Phenomena · Physics 2018-03-21 Michael Gabler , Pablo Cerdá-Durán , Nikolaos Stergioulas , José A. Font , Ewald Müller

A large set of numerical simulations of magnetohydrodynamic (MHD) turbulence induced by the magnetorotational instability (MRI) is presented. Revisiting the previous survey conducted by Sano et al. (2004), we investigate the gas pressure…

Solar and Stellar Astrophysics · Physics 2015-08-06 Takashi Minoshima , Shigenobu Hirose , Takayoshi Sano