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A sintered magnet is the mixture of aluminum-nickel-cobalt and iron (Al-Ni-Co) that is formed under high pressure for making commercial grades of sintered Alnico 2 (unoriented) and sintered Alnico 5 & 8 (oriented) magnets and another process is used for making sintered ceramic magnets. Sintering is done on smaller size Alnico magnets to produce a…

A modern samarium-cobalt is a rare earth magnet and a manufactured into a dry powder and then pressed into basic shape with a strong magnetic field and sintered under high pressure and are oriented. You can’t make the samarium-cobalt magnets into many shapes and is limited in size.

A magnetic pole is a magnet with a North or South seeking magnetic field. If you break a magnet in half, it will have another North and South seeking pole. In other words, each magnet will have it’s own North and South poles. No matter how many times you break a magnet in half, it…

All ferromagnetic materials contain regions that are microscopic and are called domains by which all magnetic moments are aligned. They contain 1017 to 1021 atoms and the boundaries between the different orientations are called domain walls and when unmagnetized the domains are at random and have no specific magnetism at the moment.

It is a system of two equal and opposite electric charges and have magnetic poles that are separated by a small distance and any molecule can be an induced if exposed to other external fields and they can align a dipole most of the time.

A cobalt magnet is actually a magnet made of 36% cobalt steel as used on the early Gibson ES-150 or commonly called the “Charlie Christian” Guitar and the EH-150 or Electric Hawaiian. Cobalt is also one of the elements used in various grades of Alnico magnets. Al (Aluminum) Ni (Nickel) Co (Cobalt)

Ceramic magnets are also known as sintered ferrites and are composed of barium or strontium ferrites. Some ceramics can be unoriented or oriented and basic ferrites are made into slurry and pressed (sintered) into shape, fired in an oven and forced air dried at 100? C. After the magnets are completed they are cut or…

This mainly refers to the Alnico family of cast magnets. Sand molds are made where the molten magnet material is poured and when cooled the hardened surface takes on the imprint of the sand mold in which it was poured. The fine rough surface is often surface ground to a desired tolerance or surface finish.

This is a process I developed to calibrate various bar and rod magnets to a desired field strength. I artificially age or degauss magnets to obtain a certain tone and output from a pickup. I like winding vintage coils and using very weak magnetic fields. It helps soften the sound of an instrument that may…

A magnet is in a pickup basically to magnetize the string. When the string vibrates, it moves the magnetic field within the coil and generates an alternating current. By removing the magnet in a pickup, there will be little residual or no magnetism needed to magnetize the ferrous string. There would be little or no…