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A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic).
A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.
[example needed] [clarification needed] The magnetic material known as "Zn Fe" has the formula Zn Fe 2 O 4, with Fe 3+ occupying the octahedral sites and Zn 2+ occupying the tetrahedral sites, it is an example of normal structure spinel ferrite. [18] [page needed] Some ferrites adopt hexagonal crystal structure, like barium and strontium ...
A ferrimagnetic material is a material that has populations of atoms with opposing magnetic moments, as in antiferromagnetism, but these moments are unequal in magnitude, so a spontaneous magnetization remains. [1] This can for example occur when the populations consist of different atoms or ions (such as Fe 2+ and Fe 3+).
This phenomenon occurs because the magnetic core's material (often iron or steel) is composed of small regions called magnetic domains that act like tiny magnets (see ferromagnetism). Before the current in the electromagnet is turned on, these domains point in random directions, so their tiny magnetic fields cancel each other out, and the core ...
A pole piece is a structure composed of material of high magnetic permeability that serves to direct the magnetic field produced by a magnet. A pole piece attaches to and in a sense extends a pole of the magnet, hence the name. Pole pieces are used with both permanent magnets and electromagnets.
Assigning your kids household chores is a rite of passage, though it’s likely to be met with eye rolling and resistance. A way to make it more fun: Implement a chore chart, so kids can see their ...
Neodymium is used as a magnetic crane which is a lifting device that lifts objects by magnetic force. [43] These cranes lift ferrous materials like steel plates, pipes, and scrap metal using the persistent magnetic field of the permanent magnets without requiring a continuous power supply. [44]
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