Antiferromagnetic Parametric Resonance Driven by Voltage-Controlled Magnetic Anisotropy

Cosmological Magnetic Fields by Parametric Resonance?

We investigate the possibility that electromagnetic fluctuations are amplified in expanding universe by parametric resonance, during the oscillatory regime of a scalar field to which they are coupled. We consider scalar electrodynamics and we find that electromagnetic fluctuations undergo exponential instabilities. This mechanism could have some relevance for the problem of large scale primordi...

Exchange-controlled magnetic anisotropy

Excitation of propagating spin waves in ferromagnetic nanowires by microwave voltage-controlled magnetic anisotropy.

The voltage-controlled magnetic anisotropy (VCMA) effect, which manifests itself as variation of anisotropy of a thin layer of a conductive ferromagnet on a dielectric substrate under the influence of an external electric voltage, can be used for the development of novel information storage and signal processing devices with low power consumption. Here it is demonstrated by micromagnetic simula...

magnetic resonance imaging in dentistry

چکیده ندارد.

Soliton Coupling Driven by Phase Fluctuations in Auto-Parametric Resonance

Introduction. For nonlinear field theory models in 1+1–dimensional space–time the equations of motion admit finite energy and finite width solutions called solitons [1]. The interest in such low-dimensional sine– Gordon (SG) models as an universal concept in nonlinear science arises from their integrability, duality properties, non-perturbative aspects, and electric-magnetic duality in gauge th...