What Is The Composition Of The Magnet

  What is the composition of the magnet

  Generally refers to the magnet is not only ferrite (iron oxide), as well as iron cobalt nickel alloy, iron rare earth alloy and other permanent magnetic materials, such as aluminum nickel cobalt, samarium cobalt, neodymium iron boron, these Also very common, very strong magnetic, these substances can be magnetic field magnetic field magnetization, and magnetization itself has a magnetic and does not disappear. The main component is iron oxide

  Magnet is not human invention, there are natural magnetite, the earliest discovery and use of magnets should be Chinese. So "compass" is one of the four Chinese inventions. As for the composition that is iron, cobalt, nickel, etc. Its atomic structure is special, the atom itself has a magnetic moment .In general, these mineral molecules are arranged in the chaos. Magnetic field interaction can not show the magnetic .. but in the external force (such as magnetic field) The direction of the arrangement of molecules tend to coincide .. that is the magnetic. It is commonly known as the iron. Iron cobalt nickel is the most commonly used magnetic material is basically magnet sub-permanent magnet and soft iron permanent magnet is coupled with strong magnetic magnetic material spin and Electron angular momentum into a fixed direction Arrangement of soft magnetic is coupled with the current (also a method of adding magnetic force) and other current to remove the soft iron will slowly lose the magnet As for the earliest magnet Who found the oldest record is the guide of the Chinese Huangdi war Chi The car is known as one of the three great inventions in China! China in the first century BC, that is, the case of magnet polarization. Warring States period, once used a natural magnet, on a dial on the copper plate, used to divination.

  Northern Song Dynasty, the use of two methods to create artificial magnets, one is to burn red iron needle, placed in the north and south direction, after rapid cooling, the use of the Earth's magnetic field will be iron needle magnetization; the other is made of magnet rubbing iron needle The Ordinary permanent magnets add other impurity elements (such as carbon) to stabilize the magnetism, but this will reduce the freedom of electrons and not easy to conduct, so the current through the lamp when the light is not up.

  Iron is a common with magnetic elements, but many other elements have a stronger magnetic, like a lot of powerful magnets is ruby iron and boron mixed into the "Mengxi Bi Tan" recorded in the existence of magnetic declination, found in the magnetic declination Under the influence of the magnetic needle pointing to the south, slightly more than the real south of the East. Based on this knowledge, and the development of the magnet as a compass of the scientific application. Magnet is only a generic term, is generally refers to the magnetic things, the actual composition does not necessarily contain iron. The pure metallic state of the iron itself is not permanent magnetic, only close to the permanent magnet will be induced to produce magnetic.