In-situ Lorentz microscopy of Fe85Si2B8P4Cu1 nanocrystalline soft magnetic alloys

Zentaro Akase, Shinji Aizawa, Daisuke Shindo, Parmanand Sharma, Akihiro Makino

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Microstructure dependence of magnetic properties of soft magnetic Fe-Si-B-P-Cu nanocrystalline alloys were studied by using in-situ Lorentz microscopy in a transmission electron microscope equipped with a magnetizing system. In particular, we investigated in detail motion of magnetic domain walls in heat-treated Fe85Si12B6P4Cu1 amorphous ribbons. Smooth motion of domain walls was observed for the optimally heat-treated (at 430 °C) nano-crystalline alloy. Pinning of domain walls was observed for higher-temperature-heat-treated (470°C) ribbons. Both ribbons showed a nanocrystalline structure containing α-Fe crystallites of about 15 nm in size. Electron diffraction patterns indicated that the higher-temperature-heat-treated samples contained boride precipitates, which is considered to cause less smooth domain wall motion.

Original languageEnglish
Pages (from-to)10-14
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 2015 Feb 1


  • Lorentz microscopy
  • Magnetic domain-wall motion
  • Nanocrystalline soft magnetic alloy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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