1 We present a three-dimensional study of the torque transmitted between tile permanent magnets 2 uniformly magnetized. All this study is based on the Coulombian model. The torque is calculated semi3 analytically by considering all the surface densities that appear on the tiles. In addition, no simplifying 4 assumptions are done in the expressions given in this paper. Consequently, the evaluati...

A case report of a 19-years-old mentally retarded girl, presented with abdominal pain, nausea and vomiting of two days duration. Physical examination revealed abdominal tenderness with guarding and rigidity. Exploratory laparotomy revealed the presence of magnets in the jejunum with perforation of jejunum and a resultant gastro jejunal fistula. The procedure involved enterotomy for removal of m...

The surface treatment with Tb-vapor sorption improves the magnetic properties of small-sized magnets. Microstructure of the Tb-treated magnets was investigated by transmission electron microscopy (TEM). By applying the Tb-treatment, the diffusion of Tb through grain boundaries occurred even inside the magnets, and then a thin and continuous wetting-layer phase was formed at the boundaries betwe...

Nd–Fe–B permanent magnets are characterised by excellent magnetic properties. However, being extremely vulnerable to the attack of both climate and corrosive environments, their applications are limited. This paper describes how, at different thicknesses of N-propyl-trimetoxy-silane, the coating affects the magnetic force of nickel plated magnets. We also investigate if the corrosion resistance...

The environment close to the chamber in inertial fusion confinement imposes severe constrains on magnets used for final focusing magnets needed for the heavy ion driver. Space is at a premium, requiring close proximity of adjacent magnets, making magnet integration imperative. In addition, the high radiation flux and heating rate imposes requirements that are as stringent as in magnetic fusion....

Skyrmions, topologically protected vortex-like nanometric spin textures in magnets, have been attracting increasing attention for emergent electromagnetic responses and possible technological applications for spintronics. In particular, metallic magnets with chiral and cubic/tetragonal crystal structure may have high potential to host skyrmions that can be driven by low electrical current excit...

Helical magnets are required in RHIC to control proton spin in a program for polarized proton colliding beam experiments. The basic construction unit is a superconducting magnet producing a four tesla dipole field that rotates through 360 degrees in a length of 2.4 meters. These magnets are assembled in groups of four to build four Snakes to control spin in the lattice and eight Rotators to ori...

We have observed the well-kown quantum Hall effect (QHE) in epitaxial graphene grown on silicon carbide (SiC) by using, for the first time, only commercial NdFeB permanent magnets at low temperature. The relatively large and homogeneous magnetic field generated by the magnets, together with the high quality of the epitaxial graphene films, enables the formation of well-developed quantum Hall st...

Interest in using magnets for generating orthodontic forces started with the widespread availability of rare earth magnetic alloys. In vivo studies have indicated that a static magnetic field and/or corrosion products from the magnetic materials may induce biological effects when in close contact with cells or tissues. In the clinical situation, orthodontic magnets are often situated some dista...

Most of the quadrupole magnets in the KEK B-factory are accompanied by a set of vertical and horizontal dipole corrector magnets in both the LER and HER rings[1]. The typical separation between a quadrupole and a dipole corrector magnet is 202 mm, as measured from the laminated ends. This corresponds to ~3.7 (2.4) times of the bore radius of a quadrupole magnet in the arc (straight) sections. S...