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Single crystals of Cu$_{13}$Ba were successfully grown out of Ba-Cu self flux. Temperature dependent magnetization, $M(T)$, electrical resistivity, $\rho(T)$, and specific heat, $C_p(T)$, data are reported. Isothermal magnetization…

材料科学 · 物理学 2014-01-28 A. Jesche , S. L. Bud'ko , P. C. Canfield

By means of two dimensional, general-relativistic, magneto-hydrodynamical simulations we investigate the oscillations of magnetized neutron star models (magnetars) including the description of an extended solid crust. The aim of this study…

高能天体物理现象 · 物理学 2012-04-13 Michael Gabler , Pablo Cerdá Durán , Nikolaos Stergioulas , José A. Font , Ewald Müller

As soon as the energy of electrons near the Fermi surface are higher than $Q$, the threshold energy of inverse $\beta-$ decay, the electron capture process will dominate. The resulting high-energy neutrons will destroy anisotropic ${}^3P_2$…

高能天体物理现象 · 物理学 2013-12-11 Z. F. Gao , Q. H. Peng , N. Wang , C. K. Chou , W. S. Huo

Neutron stars are ideal astrophysical laboratories for testing theories of the de Haas-van Alphen (dHvA) effect and diamagnetic phase transition which is associated with magnetic domain formation. The "magnetic interaction" between…

太阳与恒星天体物理 · 物理学 2016-06-01 Zhaojun Wang , Guoliang Lu , Chunhua Zhu , Baoshan Wu

The mechanism of rapid and selective heating of magnetic metal oxides under the magnetic field of microwaves which continues beyond the Curie temperature $ T_{c} $ is identified by using the Heisenberg model. Monte Carlo calculations based…

材料科学 · 物理学 2009-02-13 Motohiko Tanaka , Hirohiko Kono , Koji Maruyama

We have investigated the effects of strong magnetic field on the properties of quarkonia immersed in a thermal medium of quarks and gluons and studied its quasi-free dissociation due to the Landau-damping. Thermalizing the Schwinger…

高能物理 - 唯象学 · 物理学 2018-02-21 Mujeeb Hasan , Binoy Krishna Patra , Bhaswar Chatterjee , Partha Bagchi

We evaluate the topological character of TaAs through a detailed study of the angular, magnetic-field and temperature dependence of its magnetoresistivity and Hall-effect(s), and of its bulk electronic structure through quantum oscillatory…

We study the efficiency of Joule heating in the crustal layers of young neutron stars. It is shown that dissipation of the magnetic field is highly inhomogeneous in the crust with much faster dissipation in relatively low density layers. In…

天体物理学 · 物理学 2009-11-13 V. Urpin , D. Konenkov

The electron dynamics and the mechanisms of power absorption in radio-frequency (RF) driven, magnetically enhanced capacitively coupled plasmas (MECCPs) at low pressure are investigated. The device in focus is a geometrically asymmetric…

At the high temperatures present inside recently formed neutron stars ($T\gtrsim 5\times 10^{8}\, \text{K}$), the particles in their cores are in the "strong-coupling" regime, in which collisional forces make them behave as a single, stably…

高能天体物理现象 · 物理学 2023-09-26 Nicolás A. Moraga , Francisco Castillo , Andreas Reisenegger , Juan A. Valdivia , Mikhail E. Gusakov

The heating of ions and electrons due to turbulent dissipation plays a crucial role in the thermodynamics of the solar wind and other plasma environments. Using magnetic field and thermal plasma observations from the first two perihelia of…

太阳与恒星天体物理 · 物理学 2023-04-12 Niranjana Shankarappa , Kristopher G. Klein , Mihailo M Martinović

The transport of angular momentum by magnetic fields is a crucial physical process in formation and evolution of stars and disks. Because the ionization degree in star forming clouds is extremely low, non-ideal magnetohydrodynamic (MHD)…

太阳与恒星天体物理 · 物理学 2015-06-23 Kengo Tomida , Satoshi Okuzumi , Masahiro N. Machida

We propose a mechanism for the fast dissipation of magnetic fields which is effective in a stratified medium where ion motions can be neglected. In such a medium, the field is frozen into the electrons and Hall currents prevail. Although…

天体物理学 · 物理学 2009-10-31 S. I. Vainshtein , S. M. Chitre , A. V. Olinto

Heat assisted magnetic recording (HAMR) technology represents the most promising candidate to replace the current perpendicular recording paradigm to achieve higher storage densities. To better understand HAMR dynamics in granular media we…

The high quiescent X-ray luminosity observed in some magnetars is widely attributed to the decay and evolution of their ultra-strong magnetic fields. Several dissipation mechanisms have been proposed, each operating with different…

高能天体物理现象 · 物理学 2025-05-27 N. A. Moraga , F. Castillo , D. D. Ofengeim , A. Reisenegger , J. A. Valdivia , M. E. Gusakov , E. M. Kantor , A. Y. Potekhin

We introduce a Heisenberg Hamiltonian for describing the magnetic properties of GaMnAs. Electronic degrees of freedom are integrated out leading to a pairwise interaction between Mn spins. Monte Carlo simulations in large systems are then…

材料科学 · 物理学 2009-11-10 L. Brey , G. Gómez-Santos

The presence of strong magnetic fields in neutron stars, such as in magnetars, may significantly affect their crust-core transition properties and the crust size. This knowledge is crucial in the correct interpretation of astrophysical…

核理论 · 物理学 2019-04-03 Debarati Chatterjee , Francesca Gulminelli , Debora P. Menezes

The main idea of magnetic hyperthermia is to increase locally the temperature of the human body by means of injected superparamagnetic nanoparticles. They absorb energy from a time-dependent external magnetic field and transfer it into…

软凝聚态物质 · 物理学 2021-09-27 Zs. Iszaly , I. G. Marian , I. A. Szabo , A. Trombettoni , I. Nandori

By applying a variational principle on a magnetic system within the framework of extended irreversible thermodynamics, we find that the presence of a temperature gradient in a ferromagnet leads to a generalisation of the Landau-Lifshitz…

材料科学 · 物理学 2015-10-12 Sylvain D. Brechet , Jean-Philippe Ansermet

The linear response of two-dimensional electron gas in a perpendicular magnetic field in the presence of a spatially dependent classically smooth electrostatic potential is studied theoretically, by application of the Kubo formula for…

介观与纳米尺度物理 · 物理学 2020-06-23 O. E. Raichev