The receiver of laser pointer can be inserted into the computer cases

The receiver of laser pointer can be inserted into the computer cases.
Amorphous magnetic materials, grain boundaries, and it could avoid the head tip off, the friction of the head and the tape magnetic noise than the average head, excellent sound effects and long service life. Magnetic recording is the use of magnetic principle input (write), recording, storage and output (read) sounds, images, numbers and other information technology. Magnetic recording media of hard magnetic materials, the main requirements for magnetic recording media materials: an appropriate high coercivity Hc and resistant to environmental magnetic interference; high saturated magnetic polarization the strength μ0Ms, in order to obtain high output; remanence ratio Mr / Ms., can reduce the self-demagnetization effect, to improve the record efficiency; steep hysteresis loop, in order to reduce the output pulse width, improve credited to the information resolution; and requires a high stability. Can an emitter of laser pointer control several receivers of wireless presenter laser pointers?
Now widely used tape, disk, magnetic cards, a magnetic recording medium. Has been applied to a monk in the development of magnetic recording medium is divided into ferrite and metal into two categories, or divided into two major categories of the magnetic powder and a continuous magnetic film, including the following types of magnetic materials: of γ-Fe2O3 and Co-doped Co γ -Fe2O3 magnetic powder, is currently the most widely used magnetic recording materials. CrO2 magnetic particle, its magnetic properties such as coercivity, saturation magnetization, remanence ratio and the magnetic anisotropy constant is higher, but the Curie point (120 ° C), the preparation process and the need for high temperature, high pressure, catalyst, etc. conditions hinder its application. Metal magnetic film in the general magnetic recording mainly Fe magnetic film and Fe-CoDU two kinds of magnetic film, the former high saturation magnetization than the latter, but the coercivity is lower than the latter. laser pointer can run smoothly under Windows 98/2000/ME/XP and so on.
In these applications generally want to apply the three main types of magnetic materials. The first type is the rotating magnetic materials, applied to a variety of positive and negative direction of propagation characteristics of nonreciprocal microwave devices, such as the impedance of the positive and negative direction of propagation is very different from the rotating magnetic isolators and rotation of the ring line, etc., used gyromagnetic materials gyromagnetic ferrite material with high spin magnetic resistivity, such as garnet-yttrium ferrite (Y3Fe5O12) system, magnetoplumbite type barium ferrite (of BaFe12O19) system, and so on.