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In its most general form, the magnetoelectric effect (ME) denotes any coupling between the magnetic and the electric properties of a material. [1] [2] The first example of such an effect was described by Wilhelm Röntgen in 1888, who found that a dielectric material moving through an electric field would become magnetized. [3]
There have been reports of large magnetoelectric coupling at room-temperature in type-I multiferroics such as in the "diluted" magnetic perovskite (PbZr 0.53 Ti 0.47 O 3) 0.6 –(PbFe 1/2 Ta 1/2 O 3) 0.4 (PZTFT) in certain Aurivillius phases. Here, strong ME coupling has been observed on a microscopic scale using PFM under magnetic field among ...
MESO devices operate by the coupling of the magnetoelectric effect with the spin orbit coupling. [3] Specifically, the magnetoelectric effect will induce a change in magnetization within the device due to an induced electric field, which can then be read out by the spin orbit coupling component which converts it into an electric charge.
In 1960, Toru Moriya identified the spin-orbit coupling as the microscopic mechanism of the antisymmetric exchange interaction. [1] Moriya referred to this phenomenon specifically as the "antisymmetric part of the anisotropic superexchange interaction." The simplified naming of this phenomenon occurred in 1962, when D. Treves and S. Alexander ...
In this way, such properties as the electric polarization, orbital magnetization, anomalous Hall conductivity, and orbital magnetoelectric coupling can be expressed in terms of Berry phases, connections, and curvatures. [5] [7] [8]
A magnetic coupling is a component which transfers torque from one shaft to another using a magnetic field, rather than a physical mechanical connection. They are also known as magnetic drive couplings, magnetic shaft couplings, or magnetic disc couplings. Magnetic coupling
To obtain the tensorial optical metric, medium properties such as permittivity, permeability, and magnetoelectric couplings must first be promoted to 4-dimensional covariant tensors, and the electrodynamics of light propagation through such media residing within a background space-time must also be expressed in a compatible 4-dimensional way.
Media that exhibit magnetoelectric coupling and that are anisotropic (which is the case for many metamaterial structures [48]), are referred to as bi-anisotropic. [49] [50] Four material parameters are intrinsic to magnetoelectric coupling of bi-isotropic media.