研究目的
Investigating the behavior of Surface Acoustic Waves in magnetostrictive thin films under the bias of a tunable magnetic field for magnetic field sensing applications.
研究成果
The use of magnetostrictive thin film as a sensing element is a convenient way to measure magnetic field, with the magnetoelastic coupling allowing the detection of the thin film properties towards magnetic field. The behavior of SAW towards magnetostrictive thin film under a bias magnetic field is well explained by considering the coupling between the elastic system and the magnetic state of the system.
研究不足
The study focuses on a specific configuration of the magnetic field sensor and may not cover all possible orientations or materials. The sensitivity and range of measurement could be further optimized.
1：Experimental Design and Method Selection:
The study involves the fabrication and characterization of a SAW delay line magnetic field sensor using a multi-layered nanostructured thin film. The sensor's response to a tunable bias magnetic field is analyzed.
2：Sample Selection and Data Sources:
A uniaxial multi-layered 14×[TbCo2(3.7nm)/FeCo(4nm)] nanostructured thin film is deposited on Y36° Lithium Niobate.
3：7nm)/FeCo(4nm)] nanostructured thin film is deposited on Y36° Lithium Niobate.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: RF sputtering for thin film deposition, photolithography for device fabrication, Vibrating Sample Magnetometer (VSM) for magnetization measurement.
4：Experimental Procedures and Operational Workflow:
The SAW delay line is manufactured using photolithography, with aluminum used for InterDigital Transducers (IDTs). The device is characterized in terms of S parameters and magnetization.
5：Data Analysis Methods:
The phase shift in the transmission (S21 parameter) is analyzed to understand the magnetoelastic coupling and the ΔE-effect.
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