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3D imaging of magnetic domains in Nd2Fe14B using scanning hard X-ray nanotomography

Banerjee, Srutarshi ; Gürsoy, Doğa ; Deng, Junjing ; Kahnt, Maik LU orcid ; Kramer, Matthew ; Lynn, Matthew ; Haskel, Daniel and Strempfer, Jörg (2024) In Journal of Synchrotron Radiation 31(Pt 4). p.877-887
Abstract

Nanoscale structural and electronic heterogeneities are prevalent in condensed matter physics. Investigating these heterogeneities in 3D has become an important task for understanding material properties. To provide a tool to unravel the connection between nanoscale heterogeneity and macroscopic emergent properties in magnetic materials, scanning transmission X-ray microscopy (STXM) is combined with X-ray magnetic circular dichroism. A vector tomography algorithm has been developed to reconstruct the full 3D magnetic vector field without any prior noise assumptions or knowledge about the sample. Two tomographic scans around the vertical axis are acquired on single-crystalline Nd2Fe14B pillars tilted at two... (More)

Nanoscale structural and electronic heterogeneities are prevalent in condensed matter physics. Investigating these heterogeneities in 3D has become an important task for understanding material properties. To provide a tool to unravel the connection between nanoscale heterogeneity and macroscopic emergent properties in magnetic materials, scanning transmission X-ray microscopy (STXM) is combined with X-ray magnetic circular dichroism. A vector tomography algorithm has been developed to reconstruct the full 3D magnetic vector field without any prior noise assumptions or knowledge about the sample. Two tomographic scans around the vertical axis are acquired on single-crystalline Nd2Fe14B pillars tilted at two different angles, with 2D STXM projections recorded using a focused 120 nm X-ray beam with left and right circular polarization. Image alignment and iterative registration have been implemented based on the 2D STXM projections for the two tilts. Dichroic projections obtained from difference images are used for the tomographic reconstruction to obtain the 3D magnetization distribution at the nanoscale.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
BFeB., imaging, scanning transmission X-ray microscopy, STXM, tomographic reconstruction, X-ray magnetic circular dichroism, XMCD
in
Journal of Synchrotron Radiation
volume
31
issue
Pt 4
pages
11 pages
publisher
International Union of Crystallography
external identifiers
  • scopus:85198390310
  • pmid:38771778
ISSN
0909-0495
DOI
10.1107/S1600577524003217
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 International Union of Crystallography. All rights reserved.
id
41a84d16-cb90-4b1b-8f45-11eed9e3eb6e
date added to LUP
2024-07-24 05:46:55
date last changed
2025-06-12 11:27:58
@article{41a84d16-cb90-4b1b-8f45-11eed9e3eb6e,
  abstract     = {{<p>Nanoscale structural and electronic heterogeneities are prevalent in condensed matter physics. Investigating these heterogeneities in 3D has become an important task for understanding material properties. To provide a tool to unravel the connection between nanoscale heterogeneity and macroscopic emergent properties in magnetic materials, scanning transmission X-ray microscopy (STXM) is combined with X-ray magnetic circular dichroism. A vector tomography algorithm has been developed to reconstruct the full 3D magnetic vector field without any prior noise assumptions or knowledge about the sample. Two tomographic scans around the vertical axis are acquired on single-crystalline Nd<sub>2</sub>Fe<sub>14</sub>B pillars tilted at two different angles, with 2D STXM projections recorded using a focused 120 nm X-ray beam with left and right circular polarization. Image alignment and iterative registration have been implemented based on the 2D STXM projections for the two tilts. Dichroic projections obtained from difference images are used for the tomographic reconstruction to obtain the 3D magnetization distribution at the nanoscale.</p>}},
  author       = {{Banerjee, Srutarshi and Gürsoy, Doğa and Deng, Junjing and Kahnt, Maik and Kramer, Matthew and Lynn, Matthew and Haskel, Daniel and Strempfer, Jörg}},
  issn         = {{0909-0495}},
  keywords     = {{BFeB.; imaging; scanning transmission X-ray microscopy; STXM; tomographic reconstruction; X-ray magnetic circular dichroism; XMCD}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{Pt 4}},
  pages        = {{877--887}},
  publisher    = {{International Union of Crystallography}},
  series       = {{Journal of Synchrotron Radiation}},
  title        = {{3D imaging of magnetic domains in Nd<sub>2</sub>Fe<sub>14</sub>B using scanning hard X-ray nanotomography}},
  url          = {{http://dx.doi.org/10.1107/S1600577524003217}},
  doi          = {{10.1107/S1600577524003217}},
  volume       = {{31}},
  year         = {{2024}},
}