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2. Horseshoe magnet - Wikipedia

   en.wikipedia.org/wiki/Horseshoe_magnet

   The shape of the magnet was originally created as a replacement for the bar magnet as it makes the magnetic field stronger for a magnet of comparable strength. [5] A horseshoe magnet is stronger because both poles of the magnet are closer to each other and in the same plane which allows the magnetic lines of flux to flow along a more direct path between the poles and concentrates the magnetic ...

3. Bitter electromagnet - Wikipedia

   en.wikipedia.org/wiki/Bitter_electromagnet

   The strongest continuous magnetic fields on Earth have been produced by Bitter magnets. The strongest continuous field achieved solely with a resistive magnet is 41.5 tesla as of 22 August 2017 [update] , produced by a Bitter electromagnet at the National High Magnetic Field Laboratory in Tallahassee , Florida .

4. Cavity magnetron - Wikipedia

   en.wikipedia.org/wiki/Cavity_magnetron

   Magnetic lines of force are parallel to the geometric axis of this structure. Mechanically, the cavity magnetron consists of a large, solid cylinder of metal with a hole drilled through the centre of the circular face. A wire acting as the cathode is run down the center of this hole, and the metal block itself forms the anode.

5. Hard disk drive platter - Wikipedia

   en.wikipedia.org/wiki/Hard_disk_drive_platter

   In today's hard drives each of these magnetic regions is composed of a few hundred magnetic grains, which are the base material that gets magnetized. As a whole, each magnetic region will have a magnetization. One reason magnetic grains are used as opposed to a continuous magnetic medium is that they reduce the space needed for a magnetic region.

6. Disk read-and-write head - Wikipedia

   en.wikipedia.org/wiki/Disk_read-and-write_head

   The functional part of the head is the round, orange structure in the middle. Also note the connection wires bonded to gold-plated pads. Read–write head of a 3 TB hard disk drive manufactured in 2013. The dark rectangular component is the slider and is 1.25 mm long. The platter surface moves past the head from right to left.

7. Ferrite (magnet) - Wikipedia

   en.wikipedia.org/wiki/Ferrite_(magnet)

   A small permanent magnet electric motor disassembled, showing the two crescent-shaped ferrite magnets in the stator assembly (lower left) In contrast, permanent ferrite magnets are made of hard ferrites , which have a high coercivity and high remanence after magnetization.