Demagnetization in photomagnetic films

Daniel M. Pajerowski, Scott J. Hallock

Research output: Contribution to journalArticlepeer-review

Abstract

We present a model for demagnetization in photomagnetic films, and investigate different regimes for the magnetizing process using finite element analysis. It is found that the demagnetizing factor may depend strongly upon the high-spin fraction of the film, and the specifics of the dependence are dictated by the microscopic morphology of the photomagnetic domains. This picture allows for facile interpretation of existing data on photomagnetic films, and can even explain an observed photoinduced decrease in low-field magnetization concurrent with increase in high-spin fraction. As a whole, these results reiterate the need to consider demagnetizing effects in photomagnetic films.

Original languageEnglish
Pages (from-to)1818-1821
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume324
Issue number10
DOIs
StatePublished - May 2012
Externally publishedYes

Funding

The authors gratefully acknowledge the Summer High-school Internship Program (SHIP) at the National Institute of Standards and Technology (NIST) Center for Neutron Research, the financial support provided by NIST and the Center for High Resolution Neutron Scattering (CHRNS) , and the usage of facilities supported, in part, by the National Science Foundation under Agreement no. DMR-0944772 .

Keywords

  • Demagnetization
  • Photoinduced magnetism
  • Photomagnet
  • Prussian blue analog
  • Thin film

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