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Domain structure in a superconducting ferromagnet.

M Fauré¹, A I Buzdin

¹Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux 1, UMR 5798, CNRS, F-33405 Talence Cedex, France.

Physical Review Letters

|May 21, 2005

Summary

Superconductivity dramatically shrinks magnetic domain width in ferromagnets. This finding is crucial for understanding magnetic measurements and the interplay between superconductivity and magnetism.

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Area of Science:

Condensed Matter Physics
Materials Science

Background:

Ferromagnets exhibit inherent domain structures.
Superconducting ferromagnets are a recent discovery.
The impact of superconductivity on magnetic domain structure is largely unknown.

Purpose of the Study:

To investigate how superconductivity modifies the domain structure in ferromagnets.
To analyze the interplay between superconductivity and magnetism at the domain level.

Main Methods:

Utilized the general London theory, applicable to both singlet and triplet superconductors.
Theoretically modeled the effect of superconductivity on magnetic domain width.

Main Results:

Demonstrated that superconductivity causes a significant reduction in domain width.
Revealed the formation of a dense domain structure in superconducting ferromagnets.

Conclusions:

Superconductivity induces a dense domain structure in ferromagnets, shrinking domain width.
This dense domain structure must be considered in magnetic measurements of superconducting ferromagnets.
Studying domain structure evolution offers insights into superconductivity-magnetism interplay mechanisms.

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