spontaneous magnetization


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spontaneous magnetization

[spän′tā·nē·əs ‚mag·nə·də′zā·shən]
(electromagnetism)
Magnetization which a substance possesses in the absence of an applied magnetic field.
References in periodicals archive ?
Because the magnetization curve is saturated at 1000 Oe for the reduced Si nanoparticles, there was no evident spontaneous magnetization, but there were many defects of Si atoms with magnetic moment in the material, which react with the outer magnetic field.
The spontaneous magnetization average [mathematical expression not reproducible] as the order parameter [35]; among them [[sigma].sub.i] [member of] {+1, -1}; N x N is the size of the network.
The von Neumann entropy of the rumor propagation system can quantify well the phase transition of the system and is consistent with the phase change information obtained by measuring the spontaneous magnetization and the susceptibility of the system.
After reaching the maximum value of [chi] and below the magnetite Curie temperature, the [chi] as a temperature function follows the relationship: [chi](T) [varies] [M.sub.S](T)/K(T), where MS is the spontaneous magnetization and K the magnetic anisotropy.
The high spontaneous magnetization ([M.sub.0]) of the soft-FM region (interdot spacing), wherein the ions are irradiated, leads to spike noise in the storage media.
The team found that all three compounds show spontaneous magnetization and a distinctive hysteresis when exposed to a changing external magnetic field--indicative of long-range magnetic ordering, not unlike inorganic magnets.
As is well-known, the magnetization of a sample, produced without the action of an external magnetic field, is called spontaneous magnetization. As the temperature increases, the arrangement of the spins is affected by thermal movement which results in a decrease of the spontaneous magnetization in accordance with the Weiss-Curie law.
The Langevin function L([xi]) = coth([xi]) - 1/f which is valid at zero anisotropy is an example of equilibrium functions where [xi] = ([[mu].sub.0][M.sub.s]V[H.sub.max])/([k.sub.B]T) in which [[mu].sub.0][H.sub.max] is the external applied field, [M.sub.s] is the spontaneous magnetization of the nanoparticle, V is the volume of nanoparticle, [k.sub.B] is the Boltzmann constant, and T is the temperature.
(2) The axes of crystallographic anisotropy [<[k.sub.A]>.sup.(1)] and [<[k.sub.A]>.sup.(2)] of both uniaxial ferromagnets are considered to be parallel to the axis OZ, and the vectors of phases' spontaneous magnetization [I.sup.(1).sub.s] and [I.sup.(2).sub.s] are located in the plane YOZ containing long axes of magnetic phases andmake angles [[??].sup.(1)] and [[??].sup.(2)] with and the axis OZ, respectively.

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