A magnet is an object or material that can produce a magnetic field of its own. That magnetic field is responsible for the property of magnets to attract or repel other magnets, and pull objects that are ferromagnetic, like iron. Electrons are the reason behind the production of magnetic fields and magnetism. In permanent magnets, spinning of electrons creates the magnetism.Continue Reading
In most materials, the arrangement of atoms is such that the electrons cancel the magnetic orientation of each other. In the atomic makeup of ferromagnetic substances, areas known as domains are formed by smaller groups of atoms. In domains, the magnetic orientation of all the electrons is the same. If the domains in an object or material are aligned in one direction, it becomes a magnet.
At room temperature, there are only four elements that are ferromagnetic: cobalt, gadolinium, iron and nickel. Dysprosium is an element that is ferromagnetic only at low temperatures. In electromagnets, movement of electrons through a conducting material is responsible for the generation of the magnetic field.
Each magnet has two poles: the north pole and the south pole. Field lines that start from the north pole of the magnet and end at the south pole are used for representing the magnetic field of that magnet.Learn more about Magnetism
The NDT Resource Center describes exposing a magnet to a reversing and decreasing magnetic field as one way to remove its magnetic properties. This is not the most effective method of demagnetizing a magnet, but it is far simpler to perform than the most effective method, which involves heating the magnetic material to a high temperature. Exposing a magnet to a reversing magnetic field demagnetizes it almost completely.Full Answer >
Aluminum is not attracted to a magnet unless it is in a strong magnetic field. In strong magnetic fields, aluminum can become slightly magnetic. Under normal circumstances, aluminum does not exhibit magnetism; aluminum can produce an electrical current when it interacts with a magnet.Full Answer >
Magnetic levitation is a method of supporting an object with the repulsive force of magnets and the stability of servomechanisms. The object is thus suspended in the air, counteracting the effects of gravity.Full Answer >
Magnets that can be made easily from material found at home are called homemade magnets. These are very small and weak magnets. They are primarily for having fun and teaching children about magnetism.Full Answer >