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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
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Modeling magnetization curves in magnetic thin films with striped patterns.

M Di Pietro Martínez1, J Milano, M Eddrief

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This study models magnetic stripe patterns in thin films. We extracted geometric information like domain wall width and magnetization canted angle from magnetization curves.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Magnetism

Background:

  • Magnetic thin films often exhibit stripe patterns.
  • In-plane magnetization curves show linear behavior below saturation field for these patterns.

Purpose of the Study:

  • To develop free energy models for in-plane magnetization curves.
  • To extract geometrical information of stripe patterns, including domain wall width and maximum canted angle.

Main Methods:

  • Developing free energy models.
  • Analyzing in-plane magnetization curves.
  • Applying models to Fe(1-x)Ga(x) magnetic films.

Main Results:

  • The models successfully extract geometrical parameters.
  • For Fe(1-x)Ga(x) films with 160 nm period, a maximum canted angle of 85° was found.
  • A domain wall width of approximately 30 nm was determined.

Conclusions:

  • Free energy models are effective for characterizing magnetic stripe patterns.
  • The study provides key geometrical insights into magnetic domain structures.