Resolving the spin polarization and magnetic domain wall width of (Nd,Dy)2Fe14B with spin-polarized scanning tunneling microscopy

被引：2
|
作者：
Miyamachi, Toshio [1 ,2 ,3 ]
Suergers, Christoph [4 ]
Wulfhekel, Wulf [4 ,5 ]
机构：
[1] Nagoya Univ, Inst Mat & Syst Sustainabil IMaSS, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan
[2] Nagoya Univ, Grad Sch Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan
[3] Nagoya Univ, Sch Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan
[4] Karlsruhe Inst Technol KIT, Phys Inst, Wolfgang Gaede Str 1, D-76131 Karlsruhe, Germany
[5] Karlsruhe Inst Technol KIT, Inst Quantum Mat & Technol, D-76021 Karlsruhe, Germany
来源：
APPLIED PHYSICS EXPRESS | 2021年 / 14卷 / 11期
关键词：
spin-polarized scanning tunneling microscopy; magnetic domain wall; surface science; nanomagnetism; Neodymium magnet (NdFeB); CRYSTAL-STRUCTURE; ND2FE14B; Y2FE14B;
D O I：
10.35848/1882-0786/ac2a56
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The electronic structure and the domain wall width of industrial (Nd,Dy)(2)Fe14B 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.
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页数：5
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