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  2. Magnetic hysteresis - Wikipedia

    en.wikipedia.org/wiki/Magnetic_hysteresis

    Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. Even when the field is removed, part of the alignment will be retained: the material has become magnetized. Once magnetized, the magnet will stay magnetized indefinitely.

  3. Jiles–Atherton model - Wikipedia

    en.wikipedia.org/wiki/Jiles–Atherton_model

    This is one of the most popular models of magnetic hysteresis. Its main advantage is the fact that this model enables connection with physical parameters of the magnetic material. [2] Jiles–Atherton model enables calculation of minor and major hysteresis loops. [1] The original Jiles–Atherton model is suitable only for isotropic materials. [1]

  4. Stoner–Wohlfarth model - Wikipedia

    en.wikipedia.org/wiki/Stoner–Wohlfarth_model

    The shape of the hysteresis loop has a strong dependence on the angle between the magnetic field and the easy axis (Figure 3). If the two are parallel (θ = 0), the hysteresis loop is at its biggest (with m h = h s = 1 in normalized units). The magnetization starts parallel to the field and does not rotate until it becomes unstable and jumps to ...

  5. Bean's critical state model - Wikipedia

    en.wikipedia.org/wiki/Bean's_critical_state_model

    Calculated magnetization curve for a superconducting slab, based on Bean's model. The superconducting slab is initially at H = 0. Increasing H to critical field H* causes the blue curve; dropping H back to 0 and reversing direction to increase it to -H* causes the green curve; dropping H back to 0 again and increase H to H* causes the orange curve.

  6. File:IAH diagram.pdf - Wikipedia

    en.wikipedia.org/wiki/File:IAH_diagram.pdf

    This image or file is a work of a Federal Aviation Administration employee, taken or made as part of that person's official duties. As a work of the U.S. federal government , the image is in the public domain in the United States.

  7. Preisach model of hysteresis - Wikipedia

    en.wikipedia.org/wiki/Preisach_model_of_hysteresis

    A sample of iron, for example, may have evenly distributed magnetic domains, resulting in a net magnetic moment of zero. Mathematically similar models seem to have been independently developed in other fields of science and engineering. One notable example is the model of capillary hysteresis in porous materials developed by Everett and co ...

  8. Coercivity - Wikipedia

    en.wikipedia.org/wiki/Coercivity

    Typically the coercivity of a magnetic material is determined by measurement of the magnetic hysteresis loop, also called the magnetization curve, as illustrated in the figure above. The apparatus used to acquire the data is typically a vibrating-sample or alternating-gradient magnetometer. The applied field where the data line crosses zero is ...

  9. Charles Proteus Steinmetz - Wikipedia

    en.wikipedia.org/wiki/Charles_Proteus_Steinmetz

    Steinmetz's equation, derived from his experiments, defines the approximate heat energy due to magnetic hysteresis released, per cycle per unit volume of magnetic material. A Steinmetz solid is the solid body generated by the intersection of two or three cylinders of equal radius at right angles.