Eur. Phys. J. Plus (2022) 137: 480
https://doi.org/10.1140/epjp/s13360-022-02680-0

Regular Article

Tailoring the morphology of CoNi alloy by static magnetic field for electromagnetic wave absorption

¹ Institute of Solid State Physics, Chinese Academy of Sciences, 230031, Hefei, Anhui, China
² Key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, China
³ Laser and Optronics Center, Department of Physics, University of Engineering and Technology, Lahore, Pakistan
⁴ Office of Research Innovation and Commercialization (ORIC), Bahria University, Karachi Campus, Islamabad, Pakistan
⁵ CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, HFIPS, Anhui, Chinese Academy of Sciences, 230031, Hefei, China
⁶ Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, HFIPS, Anhui, Chinese Academy of Sciences, 230031, Hefei, China
⁷ College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, China

^c vickyfuelche@yahoo.com
^g linian@issp.ac.cn
^h zywang@iim.ac.cn

Received: 7 November 2021
Accepted: 3 April 2022
Published online: 18 April 2022

Abstract

In quest to find a non-contact self-assembly synthesis of magnetic materials, magnetic field assisted chemical reactions have attracted enormous research attention. In this study, the influence of static magnetic field on structure, self-assembly, and magnetic and microwave absorption properties of CoNi alloy has been reported. By applying the magnetic field, the obtained CoNi nanochains own uniform size and superior magnetic and microwave absorption performance. Results demonstrated that properties of CoNi depend on their shape and morphology, as the shape of particle varied, the value of saturation magnetization (Ms) gradually increased. In addition, the CoNi nanochains synthesized under magnetic field achieved the minimum reflection loss (R_L) of − 38 dB with a sample thickness of 3 mm. This improved microwave absorption performance can be attributed to conduction loss, eddy current loss, and interchain multiple reflections of microwaves. Therefore, it is convincing that magnetic fields can greatly influence the properties of CoNi by varying shape and morphology. This study provides a new route for designing novel heterostructure materials under the static magnetic field, which can be used not only in microwave absorption devices but also in other practical applications.