enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Magnetic hysteresis - Wikipedia

    en.wikipedia.org/wiki/Magnetic_hysteresis

    Magnetic hysteresis can be characterized in various ways. In general, the magnetic material is placed in a varying applied H field, as induced by an electromagnet, and the resulting magnetic flux density (B field) is measured, generally by the inductive electromotive force introduced on a pickup coil nearby the sample.

  3. Vibrating-sample magnetometer - Wikipedia

    en.wikipedia.org/wiki/Vibrating-sample_magnetometer

    The current is proportional to the magnetization of the sample - the greater the induced current, the greater the magnetization. As a result, typically a hysteresis curve will be recorded [5] and from there the magnetic properties of the sample can be deduced. The idea of vibrating sample came from D. O. Smith's [6] vibrating-coil magnetometer.

  4. Ferromagnetic material properties - Wikipedia

    en.wikipedia.org/wiki/Ferromagnetic_material...

    Hysteresis loop Induction B as function of field strength H for H varying between H min and H max; for ferromagnetic material the B has different values for H going up and down, therefore a plot of the function forms a loop instead of a curve joining two points; for perminvar type materials, the loop is a "rectangle" (Domain Structure of Perminvar Having a Rectangular Hysteresis Loop, Williams ...

  5. Saturation (magnetic) - Wikipedia

    en.wikipedia.org/wiki/Saturation_(magnetic)

    Ferromagnetic materials (like iron) are composed of microscopic regions called magnetic domains, that act like tiny permanent magnets that can change their direction of magnetization. Before an external magnetic field is applied to the material, the domains' magnetic fields are oriented in random directions, effectively cancelling each other ...

  6. Coercivity - Wikipedia

    en.wikipedia.org/wiki/Coercivity

    A family of hysteresis loops for grain-oriented electrical steel, a soft magnetic material. B R denotes retentivity and H C is the coercivity. The wider the outside loop is, the higher the coercivity. Movement on the loops is counterclockwise.

  7. Remanence - Wikipedia

    en.wikipedia.org/wiki/Remanence

    The effect of a magnetic hysteresis loop is measured using instruments such as a vibrating sample magnetometer; and the zero-field intercept is a measure of the remanence. In physics this measure is converted to an average magnetization (the total magnetic moment divided by the volume of the sample) and denoted in equations as M r .

  8. Hysteresis - Wikipedia

    en.wikipedia.org/wiki/Hysteresis

    An adsorption isotherm showing hysteresis is said to be of Type IV (for a wetting adsorbate) or Type V (for a non-wetting adsorbate), and hysteresis loops themselves are classified according to how symmetric the loop is. [17] Adsorption hysteresis loops also have the unusual property that it is possible to scan within a hysteresis loop by ...

  9. Preisach model of hysteresis - Wikipedia

    en.wikipedia.org/wiki/Preisach_model_of_hysteresis

    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-workers. Since then, following the work of people like M. Krasnoselkii, A. Pokrovskii, A. Visintin, and I.D. Mayergoyz, the ...