Iron, nickel, cobalt and gadolinium are naturally ferromagnetic elements. Common usage of the term "magnetic" refers to this form of magnetism. Other elements are capable of forming magnetic compounds, but are not magnetic in their pure states.Know More
Powerful rare earth magnets are referred to by the names of their component rare earth elements, but these elements are not ferromagnetic on their own. Neodymium magnets are the best-known type of rare earth magnets and composed of an alloy of neodymium, iron and boron. Samarium magnets consist of an alloy of samarium and cobalt. These are useful at high temperatures where neodymium magnets would lose their ferromagnetism.
Other elements that are naturally nonmagnetic can undergo laboratory-induced ferromagnetism. When lithium gas is supercooled to near absolute zero, it exhibits ferromagnetism. This is the only recorded instance of a magnetic gas. While they are solids, not gases, compounds formed from actinide series elements exhibit similar magnetic properties when cooled.
The most powerful naturally occurring magnet is a compound, not a pure element: magnetite, or iron oxide. Naturally magnetized pieces of magnetite are called lodestones and have been used for their magnetic properties since ancient times. Large deposits of magnetite are magnetic enough to interfere with compasses.Learn more about Magnetism
The Earth's molten core rotates at a high speed, which generates the planet's magnetic field. While this field changes in intensity and location over time, it provides valuable protection against solar winds.Full Answer >
Earth's magnetic field acts as a shield that diverts charged particles from the solar wind away from tropical and temperate latitudes thus preventing the loss of atmosphere due to impacting particles from the sun. Planets without strong magnetic fields tend to lose their atmospheres to space.Full Answer >
Magnetic lines of force are used to represent the strength and orientation of a magnetic field. Sometimes referred to as magnetic field lines, this concept provides a useful way to represent various components of the magnetic field.Full Answer >
Temperature affects magnetism by either strengthening or weakening a magnet's attractive force. A magnet subjected to intense heat experiences a reduction in its magnetic field. Conversely, when the same magnet is exposed to low temperatures, its magnetic property is enhanced.Full Answer >