Publication

Influence of Spatial-Distribution of Trapped Magnetic-Flux on the Effective Pinning Energy of Vortices in Ceramic Y-Ba-Cu-O

Alexander Tagantsev
1994
Journal Articles

Abstract

Relaxation of the isothermoremanent magnetization M(IR) has been studed in ceramic Y-Ba-Cu-O. The value of the effective pinning energy U(eff) has been determined at different temperatures according the relationship dlnM(IR)/dlnt = - kT/U(eff). It was shown that the dependence of U(eff) on the magnetizing field H(o) can be attributed to the evolution of the trapped flux distribution (as H(o) is varied) without involving any assumptions about the dependence of the pinning barrier on the field.

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https://infoscience.epfl.ch/entities/publication/fa697bd4-0191-4541-b98a-efc59bba3aa9

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Alexander Tagantsev
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/fa697bd4-0191-4541-b98a-efc59bba3aa9

About this result

Related concepts (20)

Magnetization

In classical electromagnetism, magnetization is the vector field that expresses the density of permanent or induced magnetic dipole moments in a magnetic material. Movement within this field is described by direction and is either Axial or Diametric. The origin of the magnetic moments responsible for magnetization can be either microscopic electric currents resulting from the motion of electrons in atoms, or the spin of the electrons or the nuclei. Net magnetization results from the response of a material to an external magnetic field.

Demagnetizing field

The demagnetizing field, also called the stray field (outside the magnet), is the magnetic field (H-field) generated by the magnetization in a magnet. The total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents. The term demagnetizing field reflects its tendency to act on the magnetization so as to reduce the total magnetic moment.

Magnetic field

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets.

Related publications (1)

Influence of Spatial-Distribution of Trapped Magnetic-Flux on the Effective Pinning Energy of Vortices in Ceramic Y-Ba-Cu-O

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Permalloy thin films exchange-coupled to arrays of stencilled cobalt islands