高度磁电机械合效应在自偏磁电复合材料中,由激光热回火诱导
Dan Xian1, Yanan Zhao2,3, Yongjun Du2,3
1State Key Laboratory of Mechanical Manufacturing Systems Engineering, School of Instrument Science and Technology, Xi'an Jiaotong University, 710049, Xi'an, China.
Microsystems & nanoengineering
|July 14, 2025
概括
使用Metglas和PMN-PT的先进磁电复合材料通过激光火实现了通过激光火增加7倍的合. 这种自我偏差材料使得高灵敏度的磁场检测成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 高性能磁电 (ME) 复合材料对于需要强大的ME合和低磁性损失的先进应用至关重要.
- 现有的材料往往依赖于外部激发源,限制了它们的被动感应能力.
研究的目的:
- 开发一种新的 (2-2) 连接性ME层材质,具有增强的磁电合和自我偏差能力.
- 为了研究激光诱导的纳米结构和交换偏差 (EB) 对ME表现的影响.
主要方法:
- 制造一个 (2-2) ME层,集成FeSiB合金 (Metglas) 和Pb(Mg,Nb) O3-PbTiO3 (PMN-PT) 单晶.
- 激光热的应用,在Metglas上创建纳米结构,包括氧化绝缘层和磁双极层.
- ME合系数,机械质量因子 (Qm) 和磁性检测极限的表征.
主要成果:
- 实现了2033.4V/Oe·cm的ME合系数,增加了7倍.
- 由于激光诱导的纳米结构,提高了超过350的机械质量因子 (Qm).
- 通过交换偏差 (EB) 效应,证明了67.45V/Oe·cm的自我偏差性能.
- 呈现出极好的被动直流磁探测极限22 nT和弱交流磁探测极限到383 fT.
结论:
- 激光热显著增强了Metglas/PMN-PT复合材料中的ME合.
- 诱导的纳米结构和EB效应是实现自我偏差和高灵敏性的关键.
- 开发的复合材料显示了被动电流测量,水下通信和敏感磁探测应用的巨大潜力.
更多相关视频
相关概念视频
Biasing of Metal-Semiconductor Junctions
336
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
336
Lenz's Law
4.3K
The direction in which the induced emf drives the current around a wire loop can be found through the negative sign. However, it is usually easier to determine this direction with Lenz's law, named in honor of its discoverer, Heinrich Lenz (1804–1865). Lenz's law states that the direction of the induced emf drives the current around a wire loop always to oppose the change in magnetic flux that causes the emf.
If a bar magnet is moved toward a coil such that the magnetic flux...
If a bar magnet is moved toward a coil such that the magnetic flux...
4.3K
Induction
4.2K
An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
A...
A...
4.2K
Potential Due to a Magnetized Object
359
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
359
Mutual Inductance
2.6K
Inductance is the property of a device that tells us how effectively it induces an emf in another device. In other words, it is a physical quantity that expresses the effectiveness of a given device.
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
2.6K


