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We present a detailed analysis of the magnetic field structure found in general relativistic 3D MHD simulations of accreting tori in the Kerr metric with different black hole spins. Among the properties analyzed are the field strength as a…

Astrophysics · Physics 2009-11-10 Shigenobu Hirose , Julian H. Krolik , Jean-Pierre De Villiers , John F. Hawley

The wedge geometry closed by a circular-cylindrical arc is a nontrivial generalization of the cylinder, which may have various applications. If the radial boundaries are not perfect conductors, the angular eigenvalues are only implicitly…

High Energy Physics - Theory · Physics 2010-05-25 I. Brevik , S. A. Ellingsen , K. A. Milton

The AC loss in ReBCO coated conductors is large in situations when the conductors are subjected to a considerable magnetic field, like in rotating machines, transformers and high-field magnets. Roebel cables can reduce the AC loss in these…

Superconductivity · Physics 2015-05-30 Enric Pardo , Francesco Grilli

The anomalous conducting phase that has been shown to exist in zero field in dilute two-dimensional electron systems in silicon MOSFETs is driven into a strongly insulating state by a magnetic field of about 20 kOe applied parallel to the…

Strongly Correlated Electrons · Physics 2009-10-30 D. Simonian , S. V. Kravchenko , M. P. Sarachik

We present a detailed analysis of harmonic longitudinal and Hall voltage measurements for in-plane magnetized Pt/Co/Ta and Ta/Co/Pt trilayers in reference to Pt/Co and Ta/Co bilayers. Enhancement of spin-orbit torques (SOTs) and…

Mesoscale and Nanoscale Physics · Physics 2021-11-17 Anastasiia Moskaltsova , Denis Dyck , Jan-Michael Schmalhorst , Günter Reiss , Timo Kuschel

For enhancing the core heating efficiency in electron-driven fast ignition, we proposed the fast electron beam guiding using externally applied longitudinal magnetic fields. Based on the PIC simulations for the FIREX-class experiments, we…

Plasma Physics · Physics 2019-08-14 T. Johzaki , T. Taguchi , Y. Sentoku , A. Sunahara , H. Nagatomo , H. Sakagami , K. Mima , S. Fujioka , H. Shiraga

Hard magnets with high coercivity, such as Nd2Fe14B and SmCo5 alloys, can maintain magnetisation under a high reverse external magnetic field and have therefore become irreplaceable parts in many practical applications. Molecular magnets…

Both the in-plane and out-of-plane magnetoresistivities have been measured in the normal state of an optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal with a magnetic field applied parallel and perpendicular to the CuO2 planes. Whatever…

Superconductivity · Physics 2009-10-31 D. Thopart , A. Wahl , A. Maignan , Ch. Simon

The thickness dependence of spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers is studied using the first-principles non-equilibrium Green's function formalism combined with the Anderson disorder model. A systematic…

Mesoscale and Nanoscale Physics · Physics 2020-01-22 K. D. Belashchenko , Alexey A. Kovalev , M. van Schilfgaarde

There is a similar behaviour between the toroidal coordinates and the dipole magnetic field produced by a circular loop. In this work we evaluate up to what extent the former can be used as a representation of the latter. While the tori in…

Classical Physics · Physics 2012-02-14 Esteban Chávez-Alarcón , J. Julio E. Herrera-Velázquez

We study equilibrium magnetic field configurations in a neutron star (NS) whose core has type-II superconducting protons. Unlike the equations for normal matter, which feature no special field strength, those for superconductors contain the…

High Energy Astrophysical Phenomena · Physics 2015-06-16 S. K. Lander

The Comisso-Asenjo mechanism is a novel mechanism proposed recently to extract energy from black holes through magnetic reconnection of the surrounding charged plasma, in which the magnetic field plays a crucial role. In this work, we…

General Relativity and Quantum Cosmology · Physics 2024-07-22 Shao-Jun Zhang

In this study, we show that any system consisting of magnetic dipoles forming ordered or disordered configurations can be simplified to a form mathematically equivalent to a system consisting of two magnetic dipoles. It is shown that the…

Materials Science · Physics 2014-02-05 Igor Dimitrov , Ulaş Dinç

Vacuum arc thruster performance in a magnetic nozzle configuration is experimentally characterized. Measurements are performed on a miniature coaxial thruster with an anode inner diameter of $1.8$ mm. The magnetic field B is produced by a…

Plasma Physics · Physics 2020-06-25 Satyajit Chowdhury , Igal Kronhaus

Recently several device and circuit design techniques have been explored for applying nano-magnets and spin torque devices like spin valves and domain wall magnets in computational hardware. However, most of them have been focused on…

Disordered Systems and Neural Networks · Physics 2013-08-26 Mrigank Sharad , Charles Augustine , Kaushik Roy

This paper deals with bounds satisfied by the effective non-symmetric conductivity of three-dimensional composites in the presence of a strong magnetic field. On the one hand, it is shown that for general composites the antisymmetric part…

Analysis of PDEs · Mathematics 2015-05-28 Marc Briane , Graeme W. Milton

Magnetic barriers in two-dimensional electron gases are shifted in B space by homogeneous, perpendicular magnetic fields. The magnetoresistance across the barrier shows a characteristic asymmetric dip in the regime where the polarity of the…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 S. Hugger , M. Cerchez , H. Xu , T. Heinzel

Using a microscopic theory for the magnetoconductivity at low magnetic fields we show how the Hall and longitudinal conductivity can be calculated in the low scattering rate limit. In the lowest order of the scattering rate, we recover the…

Mesoscale and Nanoscale Physics · Physics 2021-07-28 Viktor Könye , Masao Ogata

This article aims at discussing computational approach to design magnet-free nonreciprocal metamaterial. Detailed mathematical derivation on floquet mode analysis is presented for Faraday and Kerr rotation. Non-reciprocity in the designed…

Computational Engineering, Finance, and Science · Computer Science 2022-05-24 Swadesh Poddar , Md. Tanvir Hasan , Md. Ragib Shakil Rafi

The magnetoresistance (MR) of 10 nm to 200 nm thin polycrystalline Co-films, deposited on glass and insulating Si(100), is studied in fields up to 120 kOe, aligned along the three principal directions with respect to the current:…

Other Condensed Matter · Physics 2009-11-11 Woosik Gil , Detlef Goerlitz , Michael Horisberger , Juergen Koetzler