A lattice Boltzmann model with interacting particles was developed in order to simulate the magneto-rheological characteristics of magnetic fluids. In the frame of this model, 6 + 1 species of particles are allowed to move across a 2D triangular lattice. Among these species, 6 of them carry an individual magnetic dipole moment and interact themselves not only as a result of local collisions, as...

X-ray tomography is a well-established technique to characterize 3D structures in material sciences and biology; its magnetic analogue--magnetic X-ray tomography--is yet to be developed. Here we demonstrate the visualization and reconstruction of magnetic domain structures in a 3D curved magnetic thin films with tubular shape by means of full-field soft X-ray microscopies. The 3D arrangement of...

We investigate tunneling decay in a magnetic field. Because of broken time-reversal symmetry, the standard WKB technique does not apply. The decay rate and the outcoming wave packet are found from the analysis of the set of the particle Hamiltonian trajectories and its singularities in complex space. The results are applied to tunneling from a strongly correlated 2D electron system in a magneti...

We study routes toward the construction of 2D colloidal pyramids. We find that magnetic beads may self-assemble into pyramids near a nonmagnetic 1D boundary as long as the number of beads in the pyramid does not exceed 10. We have also found that a strong magnetic field gradient could act as a boundary, thus assisting the self-assembly of magnetic colloids in water, and have observed the format...

We have measured the msgnetoresistance measurements of a 2D electron gas subjected to a periodic magnetic field created by the presence of type 11 superconducting stripes on the surface of the heterostructure. We observe oscillatory behaviour due to a commensurability effect between the cyclotron radius and the period of the magnetic field. The results can be understood in terms of a simple sem...

Two-dimensional (2D) electrons in an in-plane magnetic field become fully spin polarized above a field BP , which we can determine from the in-plane magnetoresistance. We perform such measurements in modulation-doped AlAs electron systems, and find that the field BP increases approximately linearly with 2D electron density. These results imply that the product |g∗|m∗, where g∗ is the effective ...

The most important goal in magnetic reconnection research is to explain the fast magnetic reconnection phenomena observed in nature. The Hall effect has been found to drive fast magnetic reconnection in 2D numerical simulations [1]. An out-of-plane quadrupole magnetic field found in these numerical simulations [2,3] is the hallmark of the Hall effect. This quadrupole magnetic field has been obs...

We have recently reported the first direct calorimetric observation of a magnetic-field-induced first-order phase transition into a high-field FFLO superconducting state at the Clogston-Chandrasekar ‘Pauli’ paramagnetic limitHp in a 2D superconductor κ − (BEDT-TTF) 2 Cu(NCS) 2 . The high-field state is both higher entropy and strongly paramagnetic, as thermodynamically required for the FFLO sta...

The theory of magnetohydrodynamics is extended to the cases of a plasma of separate magnetic and electric charges, as well as to a plasma of dyons respectively. In both these cases the system possesses electric-magnetic duality symmetry. In the former case we find that because of the existence of two independent generalized Ohm’s law equations, the limit of infinite electric and magnetic conduc...

The longitudinal thermopower of ultrahigh mobility two-dimensional 2D electrons has been measured at both zero magnetic field and at high fields in the compressible metallic state at filling factor =3 /2 and the incompressible fractional quantized Hall state at =5 /2. At zero field our results demonstrate that the thermopower is dominated by electron diffusion for temperatures below about T=150...