Lorentz TEM and LM-STEM DPC Analysis of Magnetic Domains in Soft Ferromagnets

• Autorzy: Czaja Paweł

Identyfikatory

DOI

10.24425/amm.2023.145483

• Języki publikacji: EN

Abstrakty

EN

Magnetic microstructure in the as suction cast Fe₆₉B₂₀Nb₂Hf₂Si₂Y₅ alloy was revealed by combined Lorentz-TEM and LM-STEM DPC analysis. The thin foil of the alloy was found to be composed primarily of the amorphous phase with few dendritic structures. Magnetic domains were found large in the µm range with an average domain wall width of 52 nm. The magnetic domain boundaries are easily mobile, what was confirmed by in situ applied magnetic field. The LM-STEM DPC complements the Lorentz-TEM analysis by providing details on the intensity and spatial distribution of the magnetization vector within the domains.

Słowa kluczowe

EN

Lorentz-TEM; STEM-DPC; magnetization; magnetic domains; soft ferromagnets

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 3
• Strony: 1121--1126
• Opis fizyczny: Bibliogr. 9 poz., fot., rys.

Twórcy

autor

Czaja Paweł

• The Aleksander Krupkowski Institute of Metallurgy and Materials Science Polish Academy of Sciences, 25 Reymonta Str., 30-059 Kraków, Poland

• https://orcid.org/0000-0001-5011-9323

Bibliografia

• [1] B.D. Cullity, C.D. Graham, Introduction to Magnetic Materials, IEEE PRESS, 2009.
• [2] J.N. Chapman, The investigation of magnetic domain structures in thin foils by electron microscopy, J. Phys. D: Appl. Phys. 17, 623-647 (1984).
• [3] A. Ishizuka, K. Ishizuka, Observation of phase objects using STEM-Differential Phase Contrast (DPC) microscopy, JEOL News 55 24-31 (2020).
• [4] N. Shibata, S.D. Findlay, Y. Kohno, H. Sawada, Y. Kondo, Y. Ikuhara, Differential phase-contrast microscopy at atomic resolution, Nat. Phys. 8, 611-615 (2012).
• [5] G. Herzer, Modern soft magnets: amorphous and nanocrystalline materials, Acta Mat. 61, 718-734 (2013).
• [6] P. Czaja, M. Nabiałek, Evolution of microstructure and magnetic domains in Fe74B20Nb2Hf2Si2 soft magnetic alloy studied by insitu ultra-rapid heating TEM and Lorentz TEM microscopy, Acta Phys. Pol. A142, 17-20 (2022).
• [7] T. Suzuki, A. Hubert, Determination of ferromagnetic domain wall widths by means of high voltage Lorentz microscopy, Phys. Stat. Sol. 38, K5-K8 (1970).
• [8] D.T. Ngo, L.T. Kuhn, In situ transmission electron microscopy for magnetic nanostructures, Adv. Nat. Sci.: Nanoscience and Nanotechnology 7, 045001 (2016).
• [9] N. Shibata, Atomic resolution differential phase contrast electron microscopy, J. Ceram. Soc. Jpn. 127, 708-714 (2019).

Uwagi

The work was supported by the Institute of Metallurgy and Materials Science of the Polish Academy of Sciences within the statutory tasks: Z-14.