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We extend the magnetic connection theorem of ideal magnetohydrodynamics to nonideal relativistic pair plasmas. Adopting a generalized Ohm's law, we prove the existence of generalized magnetofluid connections that are preserved by the plasma…

Plasma Physics · Physics 2017-01-23 Felipe A. Asenjo , Luca Comisso , Swadesh M. Mahajan

Using the thermodynamics formalism, we introduce a notion of intersection for projective Anosov representations, show analyticity results for the intersection and the entropy, and rigidity results for the intersection. We use the…

Differential Geometry · Mathematics 2015-02-03 Martin Bridgeman , Richard Canary , Francois Labourie , Andres Sambarino

A topological modulation of magnetic thin films can induce a magnetic anisotropy of magnetostatic origin. In this letter, we report on the magnetic properties of NiFe layers deposited on wavy shaped Si substrates. Without any modulation,…

Materials Science · Physics 2009-01-20 J. Briones , F. Montaigne , G. Lengaigne , D. Lacour , M. Hehn

We prove the existence of Alexandrov embedded closed magnetic geodesics on closed hyperbolic surfaces. Closed magnetic geodesics correspond to closed curves with prescribed geodesic curvature.

Differential Geometry · Mathematics 2014-02-26 Matthias Schneider

We present an experimental study of macroscopic and microscopic magnetic anisotropy of a spin tetramer system \cso using torque magnetometry and ESR spectroscopy. Large rotation of macroscopic magnetic axes with temperature observed from…

Strongly Correlated Electrons · Physics 2016-08-08 Mirta Herak , Dijana Žilić , Dubravka Matković Čalogović , Helmuth Berger

We show that if $\mathcal{F}_1$ and $\mathcal{F}_2$ are two transverse minimal foliations on $M = T^1S$ then either they intersect in an Anosov foliation or there exists a Reeb-surface in the intersection foliation. The existence of a Reeb…

Geometric Topology · Mathematics 2026-05-06 Sergio R. Fenley , Rafael Potrie

Nb and its compounds are widely used in quantum computing due to their high superconducting transition temperatures and high critical fields. Devices that combine superconducting performance and spintronic non-volatility could deliver…

We use the electromagnetic stress tensor to describe the elongation of paramagnetic drops in uniform magnetic fields. This approach implies a linear relationship between the shape of the drops and the square of the applied field which we…

Applied Physics · Physics 2020-06-09 Jennifer Dodoo , Adam A. Stokes

General expressions for the longitudinal and transverse resistivities of single-crystalline cubic and tetragonal ferromagnets are derived from a series expansion of the resistivity tensor with respect to the magnetization orientation. They…

Materials Science · Physics 2009-11-11 W. Limmer , M. Glunk , J. Daeubler , T. Hummel , W. Schoch , R. Sauer , C. Bihler , H. Huebl , M. S. Brandt , S. T. B. Goennenwein

We study the effect of the mapping class group of a reducible 3-manifold $M$ on each incompressible surface that is invariant under a self-homeomorphism of $M$. As an application of this study we answer a question of F. Rodriguez Hertz, M.…

Geometric Topology · Mathematics 2019-10-09 Christoforos Neofytidis , Shicheng Wang

Let $M$ be a closed oriented surface endowed with a Riemannian metric $g$ and let $\Omega$ be a 2-form. We show that the magnetic flow of the pair $(g,\Omega)$ has zero asymptotic Maslov index and zero Liouville action if and only $g$ has…

Dynamical Systems · Mathematics 2007-05-23 Gabriel P. Paternain

Coherent oscillations associated with spin precessions were observed in ultrafast optical experiments on ferromagnetic (Ga,Mn)As films. Using a complete theoretical description of the processes by which light couples to the magnetization,…

Materials Science · Physics 2009-11-11 D. M. Wang , Y. H. Ren , X. Liu , J. K. Furdyna , M. Grimsditch , R. Merlin

In models of fast magnetic reconnection, flux transfer occurs within a small portion of a current sheet triggering stored magnetic energy to be thermalized by shocks. When the initial current sheet separates magnetic fields which are not…

Solar and Stellar Astrophysics · Physics 2015-05-19 D. W. Longcope , S. J. Bradshaw

We demonstrate the possibility of dynamic imaging of magnetic fields using electromagnetically induced transparency in an atomic gas. As an experimental demonstration we employ an atomic Rb gas confined in a glass cell to image the…

Quantum Physics · Physics 2010-09-29 Eugeniy E. Mikhailov , I. Novikova , M. D. Havey , F. A. Narducci

The longitudinal transport problem (the current is applied parallel to some bias magnetic field) in type-II superconductors is analyzed theoretically. Based on analytical results for simplified configurations, and relying on numerical…

Superconductivity · Physics 2015-03-17 H. S. Ruiz , C. López , A. Badía-Majós

We consider any Finsler metric on a closed, orientable surface of genus greater than one. H. M. Morse proved that we can associate an asymptotic direction to minimal rays in the universal cover (in the Poincar\'e disc: a point on the unit…

Dynamical Systems · Mathematics 2014-09-08 Jan Philipp Schröder

The thermodynamics of a spin-1/2 magnetic multilayer system with antiferromagnetic interplanar couplings is studied using the Pair Approximation method. The special attention is paid to magnetocaloric properties, quantified by isothermal…

Materials Science · Physics 2014-09-09 Karol Szałowski , Tadeusz Balcerzak

We describe magnetic reconnection experiments using a new, pulsed-power driven experimental platform in which the inflows are super-sonic but sub-Alfv\'enic.The intrinsically magnetised plasma flows are long lasting, producing a…

For a compact three-dimensional smooth Riemannian manifold of strictly 1/4-pinched negative sectional curvature, we establish exponential mixing of the frame flow with respect to the normalized volume. More generally this result extends to…

Dynamical Systems · Mathematics 2025-12-08 Daofei Zhang

This work presents an analysis of the behavior of an electromagnetic field near the common edge of two resistive half-planes with different surface impedances. Contrary to the case of a single resistive half-plane, in the case of the…

Applied Physics · Physics 2024-08-22 Igor M. Braver , Pinchos Sh. Fridberg , Khona L. Garb , Iosif M. Yakover