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Lorentz microscopy mapping for domain wall structure study in L1(0) FePd thin films
Aurélien Masseboeuf1, Christophe Gatel, Pascale Bayle-Guillemaud
1CEA, INAC-SP2M, Laboratoire d'Etude des Matériaux et des Microscopies Avancées 17 rue des Martyrs, 38054 Grenoble Cedex 09, France. aurelien.masseboeuf@cemes.fr
Ultramicroscopy
|September 22, 2009
Summary
Lorentz transmission electron microscopy (LTEM) accurately characterizes magnetic domain walls in perpendicular magnetic anisotropy materials like FePd thin films. This study quantifies magnetic induction and reveals irregularities crucial for understanding magnetization processes.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Magnetism
Background:
- Perpendicular magnetic anisotropy (PMA) materials are vital for advanced magnetic storage technologies.
- Understanding magnetic domain wall configurations is key to optimizing device performance.
- Lorentz transmission electron microscopy (LTEM) offers high-resolution magnetic imaging capabilities.
Purpose of the Study:
- To investigate the magnetic domain wall configurations in L1(0) FePd thin films.
- To demonstrate the accuracy and suitability of LTEM for characterizing PMA materials.
- To quantitatively measure magnetic induction within domain walls.
Main Methods:
- Utilized Lorentz transmission electron microscopy (LTEM) for high-resolution imaging.
- Employed micro-magnetic modeling and LTEM phase retrieval for analysis.
- Developed an original method to separate electrical and magnetic contributions to phase information.
Main Results:
- Successfully characterized magnetic domain wall configurations in FePd thin films.
- Confirmed micro-magnetic modeling predictions with experimental LTEM data.
- Quantitatively measured magnetic induction within domain walls, revealing irregularities.
- Demonstrated LTEM's efficacy for magnetic characterization of PMA materials.
Conclusions:
- LTEM is a powerful and accurate tool for the magnetic characterization of PMA thin films.
- Observed domain wall irregularities may significantly influence magnetization processes.
- The study provides valuable insights into the magnetic behavior of FePd alloys.
