Tailoring circular magnetic domain structure and high frequency magneto-impedance of melt-extracted Co69.25Fe4.25Si13B13.5 microwires through Nb doping
Source abstract
Abstract
The surface roughness, surface magnetic domain structure (SMDS), and high frequency magneto-impedance (MI) response of melt-extracted Co69.25Fe4.25Si13B13.5 microwires with 1 at.% Nb substitution for B have been studied by atomic force microscopy (AFM), magnetic force microscopy (MFM), and impedance analyzer, respectively. We show that the Nb doping significantly increases the domain width from 729 to 1028 nm, while preserving the low surface roughness (∼2 nm) of the base composition. As a result, a greater improvement of the high frequency MI response (∼300%/Oe at 20 MHz) is achieved in the Nb-doped microwire. A well-defined circumferential anisotropy formed with Nb-substitution is key to a highly sensitive MI field sensor.
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Research context
OpenAlex topics: Magnetic properties of thin films · Metallic Glasses and Amorphous Alloys · Magnetic Properties of Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of South Florida 1 Department of Physics, , Tampa, Florida 33620, USA
Harbin Institute of Technology 2 School of Materials Science and Engineering, , Harbin 150001, People’s Republic of China
Inner Mongolia University of Technology 3 School of Materials Science and Engineering, , Hohhot 010051, People’s Republic of China
Funding
National Natural Science Foundation of China · Army Research Office
References (28)
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