In recent years, with the rapid development of a new generation of communication technologies, people have put forward new requirements in practical applications of electronic, spintronics and magnetic devices, such as passive (non-contact), lightweight, flexible, and wearable. In the field of microwave magnetics, the flexible microwave magnetic materials that can be regulated are highly expected by scientific researchers in flexible microwave magnetic devices, flexible spintronic devices, and flexible microwave detectors. However, at present, people mainly use electric and magnetic fields to control the performance of non-flexible microwave magnetic materials, which greatly limits the application of microwave magnetic materials in a wider area.
Recently, Professor Wang Hong of the Jia Chunlin Scientist Studio at Xi’an Jiaotong University successfully used the purely mechanical strain and mechanical deformation to successfully control the microwave magnetic properties of flexible CuFe2O4 epitaxial films. Compared with conventional electro-magnetically-controlled non-flexible microwave magnetic materials, this work has the following advantages: flexibility; no need for electric drive; no need to consider the phase composition of the two terms of magnetic and ferroelectric phases, and two-phase Interface problems; no need to consider the form of magnetoelectric coupling and the direction of the applied electric field. Based on the above advantages, purely mechanical strain and mechanical deformation control of microwave magnetic CuFe2O4 flexible epitaxial film is expected to be applied to passive flexible / wearable microwave electronic devices, such as flexible / wearable mechanical - magnetic deformation sensors, flexible / wearable electronic Spin devices, flexible/wearable microwave detectors, and flexible/wearable microwave magnetic signal processors.
This achievement was titled "Mechanical Strain-Tunable Microwave Magnetism in Flexible CuFe2O4 Epitaxial Thin Film for Wearable Sensors" and was selected as the online publication of Inside Front Cover by Advanced Functional Materials (IF=12.124). Liu Wenlong, a doctoral student at the School of Telecommunications of Xi'an Jiaotong University, was the first author. The work was completed under the guidance of Professor Wang Hong and Associate Professor Liu Ming. Xi'an Jiaotong University is the first author and communication author, and the cooperation unit is also the Southern University of Science and Technology, Hong Kong University of Science and Technology and Penn State University. This work was supported by the National 973 Project and the National Natural Science Fund.
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