A magnet structure, comprises: a plurality of permanent magnet members; and an adhesive layer bonding the permanent magnet members to each other, wherein the adhesive layer contains an adhesive, and a plurality of gap members, the gap members have insulation properties, each surface S of the permanent magnet members in contact with the adhesive layer has a plurality of convex parts, a reference plane is a plane including a mean line of a roughness curve of the surface S, Ry is a maximum value of heights of the convex parts from a deepest part of the surface S in a direction perpendicular to the reference plane, Rv is a distance between the reference plane and the deepest part, Rp is Ry−Rv, W1 is a width of the gap member in a direction perpendicular to the reference plane, and W1 is larger than 2Rp.

A magnetism booster assembly includes a body having a first end and a second end. The body defines a bore and a cavity formed separately from the bore. The bore extends between the first end and the second end. The cavity has a first opening adjacent the first end of the body and a second opening adjacent the second end of the body. The magnetism booster assembly also includes a magnet positioned within the cavity.

An audio device includes a frame having a first frame portion having a first circumference and a second frame portion coupled to the first frame portion. A grill tray has a second circumference smaller than the first circumference and is coupled to the first frame portion. The first circumference of the frame and the second circumference of the grill tray define a grill slot therebetween. The audio device further includes a magnet partially protruding within the grill slot.

A magnet array is disclosed comprising a plurality of polyhedral magnets arranged in a Halbach cylinder configuration, the centers of individual ones of the plurality of polyhedral magnets being arranged substantially in a plane in a magnet rack, the plurality of the polyhedral magnets at least partly enclosing a testing volume, and comprising a first plurality of polyhedral magnets arranged in a Halbach cylinder configuration and a second plurality of polyhedral magnets arranged in a non-Halbach configuration. In another aspect, a magnet array is disclosed comprising a first subset and a second subset of polyhedral magnets having different coercivities. In yet another aspect, a magnet array is disclosed wherein a subset of the centers of the individual ones of the plurality of polyhedral magnets are laterally displaced from a nominal position in the magnet rack to counteract a magnetic field gradient of the magnet array.

A magnetization device and the like appropriate for various magnetization requirements are more easily provided. Provided is a magnet holding device that is capable of holding a magnet. The magnet holding device includes a ring-shaped portion that is openable/closable and an open/close mechanism allowed to keep the ring-shaped portion in a closed state. The magnet is arrangeable in the ring-shaped portion, and the number of the magnets to be arranged is variable.

A magnetic field control system according to an embodiment of the present invention may comprise: a structure forming part for forming a three-dimensional structure having an inner space; a magnetic field generating part for generating a magnetic field, the magnetic field generating part being formed to extend from a predetermined position of the structure forming part and being disposed to face a target region defined in the inner space; and a power source part for supplying electric power to the magnetic field generating part.

Magnetic field generating unit is fixed to object that moves relative to magnetic field detecting means. Magnetic field generating unit has magnetic field generator, first support structure that is fixed to object and second support structure that is independent of first support structure. Second support structure is supported by first support structure and supports magnetic field generator. For example, second support structure is formed of a nonmagnetic material, and magnetic field generator is arranged away from first support structure.

An apparatus for assembling a repelling magnet combination, comprising a first and second magnet, a first and second holding magnet, a first holding base with a first holding base first end, and a second holding base with a second holding base first end. The first and second holding magnets are positioned at the first and second holding base first ends, and the first and second magnets are magnetically attached to the first and second holding magnets respectively, with outward faces exhibiting like magnetic polarities. The first and second magnets are brought into contact by moving the first and second holding base first ends into close proximity, whereby the first and second holding magnets exert holding forces on the first and second magnets which overcome a repelling force generated therebetween, allowing a repelling force countering means, such as an adhesive, to bond the magnets together into a repelling magnet combination.

The disclosed technology provides a nanofunctionalized magnetic material feedstock comprising: from 50 wt % to 99.5 wt % of magnetic microparticles having an average microparticle effective diameter from 1 micron to 500 microns; from 0.4 wt % to 40 wt % of one or more rare earth elements; and from 0.1 wt % to 10 wt % of metal-containing inoculant nanoparticles, wherein at least 1 wt % of the inoculant nanoparticles are chemically and/or physically disposed on surfaces of the magnetic microparticles. The nanofunctionalized magnetic material feedstock is processed using high-throughput laser-based additive manufacturing to optimize the architecture of NdFeB or other magnets, generating site-specific, demagnetization-resistant microstructures. This disclosure teaches a rapid, single-step laser-based process to tailor the easy axis alignment, grain size, and microstructure of a permanent magnet at corners and edges to resist demagnetization.

A three-dimensional magnet structure (6) made up of a plurality of individual magnets (4), the magnet structure (6) having a thickness that forms its smallest dimension, the magnet structure (6) incorporating at least one mesh (5a) exhibiting mesh cells each one delimiting a housing (5) for a respective individual magnet (4), each housing (5) having internal dimensions just large enough to allow an individual magnet (4) to be inserted into it, the mesh cells being made from a fibre-reinforced insulating material, characterized in that a space is left between the housing (5) and the individual magnet (4), which space is filled with a fibre-reinforced resin, the magnet structure (6) comprising a non-conducting composite layer coating the individual magnets (4) and the mesh structure (5a).