The word 'magnetize' is correct and usable in written English.
You can use it to describe the process of making an object magnetic, or to refer to the process of something being strongly attracted to something else. Example sentence: "The powerful magnet easily magnetized the iron nail."
Thus, a magnetic material is required that has a high permeability, so that it will magnetize readily in a small field; a high remanent magnetization, so that the stored information can be easily "read"; and not too high (but not too low) a coercive force, so that the stored information can be erased without great difficulty.
Conversely, in a pure, homogeneous material, in which there are few imperfections, it will be easy to magnetize the material to saturation with relatively low fields, and the remanent magnetization will be small.
The direction of the lines of force of this field, defined by the direction of the force exerted by the field on a (hypothetical) single magnetic north pole, is opposite to the direction of field used to magnetize it originally.
A small current is applied to the head to magnetize tiny spots on the disk surface for storage; similarly, magnetized spots on the disk generate currents in the head as it moves by, enabling data to be read.
Electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core.
A saturable core dimmer uses a small DC current to magnetize an iron core through which AC current flows.
In writing, every spot on the disk is first heated by a strong laser beam and then cooled under a magnetic field, magnetizing every spot in one direction, to store all 0s.
Picture an iron ring hanging from a magnet and magnetized so that a second ring hangs from the first and another ring from the second.
Ferromagnetic glasses are mechanically hard materials, but they are magnetically soft, meaning that they are easily magnetized by small magnetic fields.
Thus, within ferromagnetic materials, the magnetization may be more than 1,000 times larger than the external magnetizing field, because such materials are composed of highly magnetized clusters of atomic magnets (ferromagnetic domains) that are more easily lined up by the external field.
But magnetism resides in the magnet, not in the temporarily magnetized rings.
