Cow Magnet Disc
Cow magnet disc drive contains two pieces of similar waist type magnet, ndfeb rare earth magnets are used to make the, the application of magnetic properties is a magnetic objects, it has two types: natural and artificial.
The magnetism of all substances is caused by the arrangement of electrons. And everything has electrons so all materials have magnetism, but because of the difference in structure, the magnetism is quite different.
The strangest is the reaction of some iron - like substances. In they put in a plus a magnetic field, they induced magnetism, when coupled with the magnetic field disappears, the delayed due to the magnetic did not disappear completely, but there are still part of the retained in this kind of material, also is the material is magnetized by residual magnetism. These elements are known as ferromagnetic materials, such as iron, cobalt, nickel, etc.
At the beginning, magnetization was used as iron ore for iron refining.
As a magnetic surface storage, a hard disk is coated with a thin layer of magnetic material on the surface of non-magnetic alloy material, and information is stored by magnetization of the magnetic layer. The hard disk is mainly composed of disk and magnetic head and control circuit. The information is stored on the disk and the magnetic head is responsible for reading or writing. As soon as the hard disk is turned on, its disk begins to rotate at high speed. Magnetic close can use light thin film components, disc under the high transfer of aerial air buoyancy force left disk suspended above the disc head, buoyancy and head mount spring reverse tension makes the balancing head. Such contactless heads can effectively reduce wear, heat and resistance caused by friction.
When the hard disk heads after receiving a system to read data command according to the given address, first of all, according to the track number to produce driving signal to locate and then found of specific sectors, finally by the head reads the specified location information and transmit the Cache to hard disk.Magnetic snaps come in lots of distinct sizes. Traditional magnetic snaps are the most commonly offered.