The action principles for magnetic field lines and for Hamiltonian mechanics are recalled to be analogous. It is shown that the first one can be rigorously proved from first principles without analytical calculations. Not only the action principles are analogous, but also a change of canonical ...
A thin, smart, non-linear metamaterial is presented that enhances the imaging performance and increases the signal-to-noise ratio in 3T MRI significantly (up to eightfold), whilst the transmit field is not affected due to self-detuning and, thus, patient safety is also assured. This self-...
作者: Gordeev,A.V 摘要: Feasibility of magnetic field convection into a homogeneous conductor due to violation or of quasineutrality related to Hall field is demonstrated. A nonlinear equation describing the process is derived and analyzed关键词:...
Figure 1c shows the evolution of the junction resistance measured as a function of the vertically injected dc current. Positive currents correspond to an electron flow from the synthetic anti-ferromagnet to the free layer. The measurement is performed in the presence of an external field Hz =...
An electromagnetic field is produced by a space- and time-dependent charge and current distribution in some region of space acting as the source of the field. From: Basic Optics, 2016 About this pageSet alert Discover other topics On this page Definition Chapters and Articles Related Terms Recom...
FIELD: magnetic measurements; flux-gate magnetometers. SUBSTANCE: device has flux gate with copper-wire metering winding and field winding connected to generator outputs, amplifier- converter unit with resistor in feedback circuit connected to first input of measuring unit and to resistive voltage divi...
The test-field model and a realizable modification thereof are also summarized. Numerical solutions of various closures for some plasma-physics paradigms are reviewed. The variational approach to bounds on transport is developed. Miscellaneous topics include Onsager symmetries for turbulence, the ...
When compared to other ferromagnetic metals, titanium is weakly magnetic in the presence of a magnetic field. A specific effect is created with this metal. For example, a small electrical current will form in the metal when a magnet is passed over it. ...
As a result, the two OOP magnetizations in the protected regions are effectively AP coupled (Fig. 1a). In order to obtain the AP ground state, an oscillating and decaying magnetic field is applied perpendicularly to the devices, serving as the demagnetization protocol (Supplementary Information ...
These skyrmions are topologically nontrivial textures of the magnetization unit vector field m(r), whose filamentary structures resemble vortex-like strings or tubes, with typical diameters of tens of nanometers. The length of such a string is assumed to be limited only by the shape and size ...