field magnet- a magnet that provides a magnetic field in a dynamo or electric motor dynamo- generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature ...
In the classical regime, the free energy change is independent of magnetism, as the Lorentz force is conservative. In contrast, here we find that the free energy change can be amplified by adding a magnetic field to driven quantum systems. Taking a recent experimental system as an example, ...
The implication of such a conclusion in coronal mass ejections is briefly discussed and some comments are made on the maximum energy of force-free magnetic fields.Guo-QiangLi You-QiuHu中国天文和天体物理学报:英文版Li G Q,Hu Y Q.Magnetic energy of force-free fields with detached field lines....
A program for extrapolating magnetic field in the force-free approximation has much to teach us about solar magnetic fields and this review surveys what can be done and the kind of pitfalls that beset the program.doi:10.1029/GM054p0021B. C. Low...
The correlation length and the free energy of the S=1/2 XXZ chain in a magnetic field in the z direction are calculated with use of a set of equations for a series of infinite numbers. These are derived by the Bethe-ansatz method for the quantum transfer matrix. The equations for free...
In this present study we have written out the thermodynamic potential, i.e., the total free energy of a magnetically soft body within a magnetic fluid in the presence of a magnetic field. The force and moment acting on the body from the side of the magnetic field are determined through ...
_m.The magnetic energy E,azimuthal flux F_(?),and magnetic helicity H_T in the solar corona are then calculated for each force-free field solution... YQ Hu,W Li - 《天文和天体物理学研究》 被引量: 5发表: 2006年 Double Power-law Distribution of Magnetic Energy in the Solar Corona ove...
In an active region producing repeated flares the required free energy is accumulated by a strong twist of the field lines due to the rotation of a sunspot containing one end of the magnetic fluxtube. Using vector-magnetographic measurements the current flowing in the twisted field system and th...
field, in general, has no solution. Th... SI Syrovatskii - 《Solar Physics》 被引量: 56发表: 1978年 The stability of one-dimensional force-free magnetic field with singular current density surface Based on the energy integral and stability theorems given by Newcomb (1960) for linear pinch...
Here we demonstrate field-free magnetization switching of a perpendicular magnet by utilizing an Iridium (Ir) layer. The Ir layer not only provides SOTs via spin Hall effect, but also induce interlayer exchange coupling with an in-plane magnetic layer that eliminates the need for the external ...