magnetization

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A graph plots reduced magnetization versus reduced temperature for a magnet, showing experimental curves for nickel and a nickel-copper alloy, and a theoretical curve for J equals one-half. Magnetization decreases as temperature approaches the critical point.

A magnetic hysteresis curve graph with magnetization J on the vertical axis and external field Hex on the horizontal axis, showing a looped curve with key points labeled for saturation magnetization Js, remanent magnetization Jr,sat, and coercive fields Hc and Hc,r.

Figure 2: Magnetization as a function of magnetic field for a type I superconductor and a type II superconductor.

Diagram showing a small copper sample suspended between the north and south poles of an electromagnet, with magnetic field lines concentrated around the sample in an inhomogeneous magnetic field.

magnetization

physics

Also known as: magnetic polarization

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A graph plots reduced magnetization versus reduced temperature for a magnet, showing experimental curves for nickel and a nickel-copper alloy, and a theoretical curve for J equals one-half. Magnetization decreases as temperature approaches the critical point. — magnetization as a function of reduced temperature Figure 17: The reduced magnetization M/M_s as a function of reduced temperature T/T_c for a magnet.

Magnetism is a phenomenon arising from the motion of electric charges, such as electric currents or the spin of electrons. This motion creates magnetic fields, which exert forces on other magnetic objects and moving charges.123

Matter exhibits magnetic properties when placed in a magnetic field and is classified based on its interaction:
* Diamagnetic substances are weakly repelled by magnets.452
* Paramagnetic substances are weakly attracted to magnets.452
* Ferromagnetic materials, like iron, are strongly attracted and can be permanently magnetized.42

Magnetization occurs when magnetic domains within a material align. This alignment can be temporary or permanent, depending on the material and the applied field.2

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Barkhausen effect
…iron, causes it to become magnetized, not continuously but in minute steps. The sudden, discontinuous jumps in magnetization may be detected by a coil of wire wound on the ferromagnetic material; the sudden transitions in the magnetic field of the material produce pulses of current in the coil that, when…
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…iron, causes it to become magnetized, not continuously but in minute steps. The sudden, discontinuous jumps in magnetization may be detected by a coil of wire wound on the ferromagnetic material; the sudden transitions in the magnetic field of the material produce pulses of current in the coil that, when…
Read More

How Do Magnets Work?
The process of magnetization involves aligning magnetic domains, small volumes within a ferromagnetic material. Pieces of iron, nickel, and cobalt appear unmagnetized because these domains are oriented in different directions. When a magnetizing field is applied, domains reorient in the direction of the field. This alignment can be…
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The process of magnetization involves aligning magnetic domains, small volumes within a ferromagnetic material. Pieces of iron, nickel, and cobalt appear unmagnetized because these domains are oriented in different directions. When a magnetizing field is applied, domains reorient in the direction of the field. This alignment can be…
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magnetostriction
…direction and extent of its magnetization. An iron rod placed in a magnetic field directed along its length stretches slightly in a weak magnetic field and contracts slightly in a strong magnetic field. Mechanically stretching and compressing a magnetized iron rod inversely produces fluctuations in the magnetization of the rod.…
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…direction and extent of its magnetization. An iron rod placed in a magnetic field directed along its length stretches slightly in a weak magnetic field and contracts slightly in a strong magnetic field. Mechanically stretching and compressing a magnetized iron rod inversely produces fluctuations in the magnetization of the rod.…
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metallurgy
Magnetic properties
…the loss, or reversal, of magnetization will be slow, and the sample will be useful as a permanent magnet. If the metal is soft, it will quickly lose its magnetism; this will make it useful in electrical transformers, where rapid reversal of magnetization is essential.
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…the loss, or reversal, of magnetization will be slow, and the sample will be useful as a permanent magnet. If the metal is soft, it will quickly lose its magnetism; this will make it useful in electrical transformers, where rapid reversal of magnetization is essential.
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geologic history of Earth
Time scales
…from the study of the magnetization of basaltic lavas of the ocean floor. As such lavas were extruded from the mid-oceanic ridges, they were alternately magnetized parallel and opposite to the present magnetic field of Earth and are thus referred to as normal and reversed. A magnetic-polarity time scale for…
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…from the study of the magnetization of basaltic lavas of the ocean floor. As such lavas were extruded from the mid-oceanic ridges, they were alternately magnetized parallel and opposite to the present magnetic field of Earth and are thus referred to as normal and reversed. A magnetic-polarity time scale for…
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