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The low-energy light-by-light cross section as determined by the nonlinear Euler-Heisenberg QED Lagrangian is evaluated in the presence of constant magnetic fields in the center-of-mass system of the colliding photons. This cross section…

High Energy Physics - Phenomenology · Physics 2018-09-12 R. Baier , A. Rebhan , M. Wödlinger

Magnetic fluids exhibit tunable structures and electrophysical properties, making them promising for adaptive optical systems, biomedical sensors, and microelectromechanical devices. However, the dynamic evolution of their microstructure…

In this paper we report on the observation of novel and highly unusual magnetic state of light. It appears that in small holes light quanta behave as small magnets so that light propagation through such holes may be affected by magnetic…

Strongly Correlated Electrons · Physics 2009-11-10 Igor I. Smolyaninov , Jill Elliott , Anatoly V. Zayats

The radiation stability of biocompatibile magnetic fluid used in nanomedicine after electron irradiation was studied. Two types of the water-based magnetic fluids were prepared. The first one was based on the magnetite nanoparticles…

Light propagation is investigated in the context of local anisotropic nonlinear dielectric media at rest with the dielectric coefficients $\epsilon^\mu{}_\nu = \epsilon^\mu{}_\nu (\vec{E},\vec{B})$ and constant $\mu$, in the limit of…

General Relativity and Quantum Cosmology · Physics 2008-11-26 V. A. De Lorenci , R. Klippert , D. H. Teodoro

In uniaxial soft matter with a reorientational nonlinearity, such as nematic liquid crystals, a light beam in the extraordinary polarization walks off its wavevector due to birefringence, while it undergoes self-focusing via an increase in…

Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents…

Mesoscale and Nanoscale Physics · Physics 2020-09-10 Ferran Macià , Andrew D. Kent

Magnetic fields play a critical role in the propagation of charged cosmic rays. Particular field configurations supported by different astrophysical objects may be observable in cosmic ray maps. We consider a simple configuration, a…

High Energy Astrophysical Phenomena · Physics 2015-05-19 E. Battaner , J. Castellano , M. Masip

We introduce a new mechanism for the propulsion and separation by chirality of small ferromagnetic particles suspended in a liquid. Under the action of a uniform d.c. magnetic field H and an a.c. electric field E isomers with opposite…

Soft Condensed Matter · Physics 2015-05-27 E. Kirkinis , A. V. Andreev , B. Spivak

Magnetic droplets are nanoscale, non-topological, dynamical solitons that can be nucleated in different spintronic devices, such as spin torque nano-oscillators (STNOs) and spin Hall nano-oscillators (SHNOs). This chapter first briefly…

Mesoscale and Nanoscale Physics · Physics 2024-11-12 Martina Ahlberg , Sheng Jiang , Roman Khymyn , Sunjae Chung , Johan Åkerman

Binary random compacts with different proportions of small (volume V) and large (volume 2V) bare maghemite nanoparticles (NPs) are used to investigate the effect of controllably broadening the particle size distribution on the magnetic…

Magnetooptical properties of magnetic photonic crystals have been investigated in the view of their possible applications for the modern integrated-optics devices. A "transfer matrices" formalism was expanded for the case of oblique light…

Materials Science · Physics 2007-08-15 M. Vasiliev , V. -I. Belotelov , K. Alameh , R. Jeffery , V. -A. Kotov , A. -K. Zvezdin

The popularity of graphene--a pseudospin-1/2 two-dimensional Dirac-Weyl material--has prompted the search for related materials and the characterization of their properties. In this work, the magneto-optical conductivity is calculated for…

Mesoscale and Nanoscale Physics · Physics 2014-07-10 John D. Malcolm , Elisabeth J. Nicol

We study the optical properties of semiconducting transition metal dichalcogenide monolayers under the influence of strong out-of-plane magnetic fields, using the effective massive Dirac model. We pay attention to the role of spin-orbit…

Mesoscale and Nanoscale Physics · Physics 2019-03-14 G. Catarina , J. Have , J. Fernández-Rossier , N. M. R. Peres

Recent studies demonstrated the violation of reciprocity in optical processes in low-symmetry magnetic crystals. In these crystals the speed of light can be different for counter-propagating beams. Correspondingly, they can show strong…

Materials Science · Physics 2014-01-15 David Szaller , Sandor Bordacs , Istvan Kezsmarki

Monodisperse magnetite Fe3O4 nanoparticles of controlled size within 6 and 20 nm in diameter were synthesized by thermal decomposition of an iron organic precursor in an organic medium. Particles were coated with oleic acid. For all samples…

Materials Science · Physics 2011-11-09 P. Guardia , B. Batlle-Brugal , A. G. Roca , Oscar Iglesias , M. P. Morales , C. J. Serna , A. Labarta , X. Batlle

The phenomena of magneto-optical polarization rotation and circular magnetic dichroism are well known in the Faraday configuration. We present another effect, an odd magneto-optical linear dichroism, arising in nanostructures with…

Magnetic fields of cosmic bodies are generated by the hydromagnetic dynamo effect in moving electrically conducting fluids, such as liquid metals or plasmas. Once produced, cosmic magnetic fields are able to act back on moving fluids. This…

History and Philosophy of Physics · Physics 2014-03-17 Frank Stefani

Magnetic fluids are colloidal suspensions of ferromagnetic particles covered with a surfactant layer, dispersed in a host liquid. The existence of cooperative phenomena in such magnetic colloidal systems, makes the determining of their…

Materials Science · Physics 2007-05-23 D. Andru Vangheli , H. Covlescu , Gh. Ardelean , C. Stelia

We experimentally demonstrate unidirectional light transmission through two-layer nanostructured materials considering that the horizontal-to-vertical-polarization conversion efficiency in the forward direction and the…

Mesoscale and Nanoscale Physics · Physics 2019-02-14 M. Naruse , S. Ishii , J. -F. Motte , A. Drezet , S. Huant , H. Hori