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- Publisher
- IOP Publishing
- Copyright
- © 2021 The Japan Society of Applied Physics
- ISSN
- 1882-0778
- eISSN
- 1882-0786
- DOI
- 10.35848/1882-0786/ac2a56
- Publisher site
- See Article on Publisher Site
Abstract
The electronic structure and the domain wall width of industrial (Nd,Dy)2Fe14B hard magnets were investigated using low-temperature, spin-polarized scanning tunneling microscopy (STM) in ultra-high vacuum. In a first step, atomically clean and flat surfaces were prepared. The flat terraces were separated by monatomic steps. Surface termination was identified as the Fe c layer from atomically resolved STM imaging. The electronic density of states and its spin polarization agree well with ab initio predictions of the Fe c layer. High-resolution spin-polarized STM images allowed to finally resolve the domain wall width w of only 3.2 ± 0.4 nm.
Journal
Applied Physics Express – IOP Publishing
Published: Nov 1, 2021
Keywords: spin-polarized scanning tunneling microscopy; magnetic domain wall; surface science; nanomagnetism; Neodymium magnet (NdFeB)