title: Investigation of (Fe,Co)NbB-Based Nanocrystalline Soft Magnetic Alloys by Lorentz Microscopy and Off-Axis Electron Holography.
abstract: The relationship between microstructure and magnetic properties of a (Fe,Co)NbB-based nanocrystalline soft magnetic alloy was investigated by analytical transmission electron microscopy (TEM). The microstructures of (Fe0.5Co0.5)80Nb4B13Ge2Cu1 nanocrystalline alloys annealed at different temperatures were characterized by TEM and electron diffraction. The magnetic structures were analyzed by Lorentz microscopy and off-axis electron holography, including quantitative measurement of domain wall width, induction, and in situ magnetic domain imaging. The results indicate that the magnetic domain structure and particularly the dynamical magnetization behavior of the alloys strongly depend on the microstructure of the nanocrystalline alloys. Smaller grain size and random orientation of the fine particles decrease the magneto-crystalline anisotropy and suggests better soft magnetic properties which may be explained by the anisotropy model of Herzer.
authors.affiliation: 1Institute of Physics,Humboldt University of Berlin,D-12489 Berlin,Germany.
authors.forename: Changlin
authors.initials: C
authors.lastname: Zheng
authors.affiliation: 1Institute of Physics,Humboldt University of Berlin,D-12489 Berlin,Germany.
authors.forename: Holm
authors.initials: H
authors.lastname: Kirmse
authors.affiliation: 2Department of Materials Science and Engineering,Carnegie Mellon University,Pittsburgh,PA 15213,USA.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Long
authors.affiliation: 2Department of Materials Science and Engineering,Carnegie Mellon University,Pittsburgh,PA 15213,USA.
authors.forename: David E
authors.initials: DE
authors.lastname: Laughlin
authors.affiliation: 2Department of Materials Science and Engineering,Carnegie Mellon University,Pittsburgh,PA 15213,USA.
authors.forename: Michael E
authors.initials: ME
authors.lastname: McHenry
authors.affiliation: 1Institute of Physics,Humboldt University of Berlin,D-12489 Berlin,Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Neumann
mesh_terms: D000497:Alloys; D006696:Holography / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D008280:Magnetics; D053768:Metal Nanoparticles / Q000032:analysis*; D008853:Microscopy / Q000379:methods*; D046529:Microscopy, Electron, Transmission / Q000379:methods*
chemical_list: D000497:Alloys
keywords: nanocrystalline