Magnet development in 1822, the French physicist Arago and Lussac found that when the current through the winding which has iron, which enables winding of the iron magnetic magnet. This is actually the initial discovery of the principle of the electromagnet. 1823 ferrite permanent magnets, Sturgeon also did a similar experiment: He is not in a U-shaped magnet rod iron bars around the 18 laps bare copper, copper and voltaic battery when turned on When, around the U-shaped iron bars of copper coils that produce a dense magnetic field, thus making a U-shaped piece of iron bar into a "magnet." This magnet permanent magnet magnetic energy than the energy amplification times, it can pick up more than 20 times its weight of iron round pie magnet, and when the power is turned off, U-iron iron bar on what it could not suck again become an ordinary iron bar. Sturgeon electromagnet invention, so that people see the electrical energy into magnetic energy of a bright future for this invention quickly spread in the United Kingdom, the United States and Western Europe, some coastal countries. 1829, US electricity scientist Henry Sturgeon electromagnet device made some innovations, wires instead of bare copper wire, copper wire and therefore do not have to worry about being too close and short circuit. Due to the wire with the insulation permanent ferrite magnets, they can be wound tightly around the enclosure together, due to the more intensive the coil, the stronger the magnetic field is generated, thus greatly improving the electrical energy into magnetic energy capacity. To 1831, Henry trial out an update of the electromagnet, although its size is not large, but it can pick up the one-ton iron. Electromagnet invention also makes the generator power has been greatly improved. Thirties late 1930s, alnico magnet successful development, it makes possible large-scale application of the magnet. Fifties fifties magnet, there barium ferrite magnet, not only reduces the cost of a permanent magnet, the application of permanent magnet materials in turn broaden the high-frequency fields. Sixties to the sixties, samarium cobalt permanent emergence, for the application of magnets has opened up a new era. So far, the rare earth permanent magnet has experienced first-generation SmCo5, the second generation of precipitation hardening Sm2Co17, third generation Nd-Fe-B permanent magnet materials. Ferrite magnets are still present, the largest amount of permanent magnet materials, NdFeB magnets but has greatly exceeded the value of the ferrite permanent magnet materials, NdFeB magnet production has become a major industry. Warring States Period magnetic phenomena found our ancestors have accumulated a lot of understanding in this area, often encountered in the search for iron ore magnetite, that magnet (the main ingredient is iron oxide). These findings have long been documented down. "Tube" of several articles in the earliest records of these findings: "the mountains are a magnet who, under which a bronze." Powerful magnet manufacturers, new magnetic Tong Xin (certified), from Dongguan City, Jiangsu magnet magnetic Xin Tong Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) is Dongguan, Guangdong, magnetic leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the new Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Tong Xin a better future.