Magnetoelectric boundary simulated by a Chern–Simons-like model

In this work we study some physical phenomena that emerge in the vicinity of a magnetoelectric boundary. For simplicity, we restrict to the case of a planar boundary described by a coupling between the gauge field with a planar external Chern–Simons-like potential. The results are obtained exactly. We compute the correction undergone by the photon propagator due to the presence of the Chern–Simons coupling and we investigate the interaction between a stationary point-like charge and the magnetoelectric boundary. In the limit of a perfect mirror, where the coupling constant between the field and the potential diverges, we recover the image method. For a non perfect mirror, we show that we have an attenuated image charge and, in addition, an image magnetic monopole whose field strength does not exhibit the presence of the undesirable and artificial divergences introduced by Dirac strings. We also study the interaction between the plate and a quantum particle with spin. In this case we have a kind of charge-magnetic dipole interaction due to the magnetoelectric properties of the plate.

Magnetic dipole interaction with multipole magnetic field lines of neutron stars

Conservation of magnetic flux is associated with regions of the powerful magnetic fields (B ∽ 1013 G) near neutron stars' surface. The vector potential generated by moving electric charge Q is uniformly distributed within a Neutron star's surface (radius R). The evolution of the magnetic field of isolated neutron stars is studied and based on magnetic flux conservation; the multipolar magnetic fields for (l = 1; l = 2; l = 3; l = 4) have calculated. We developed the field line equations and simulated the magnetic field line geometry for the interaction between neutron stars’ dipole–multipolar magnetic fields using the MATLAB software program.

Development and application of the density functional approach with spin density magnetic dipole interaction

Work on magnetism, spintronics and multiferroics has generated a great deal of new insight in the field of nanotechnology. According to Professor Tatsuki Oda, who is an expert in this field, one of the most important advancements is the new computational approach to assessing magnetic anisotropy energy (MAE) in antiferromagnets and ferrimagnets in realistic materials. Oda and his team from the Kanazawa University in Japan have taken this unique approach to achieve a world first - offering new tools to help researchers overcome the existing difficulties experienced in measuring antiferromagnetism. In a recent project, Oda's team have been considering the development and application of the density functional approach with spin density magnetic dipole interaction.

A perfect triangular dysprosium single-molecule magnet with virtually antiparallel Ising-like anisotropy

A perfect triangular Dy3 single-molecule magnet was reported. Each Dy(iii) magnetic axis is oriented almost normal to the plane of Dy3, and the intramolecular magnetic dipole interaction gives rise to a virtually antiparallel Ising-like ground state.