Characterization of magnetomechanical properties in FeGaB thin films
Abstract
Layered magnetic/piezoelectric heterostructures have drawn a great amount of interest for their potential use in ultra-sensitive magnetoelectric (ME) sensors, ME antennas, voltage tunable inductors, magnetic tunable resonators, etc. It is critically important to characterize the saturation magnetostriction, piezomagnetic coefficient, ΔE effect, and magnetomechanical coupling factor of magnetic thin films, which determine the performance of these ME devices. In this work, a sensitive system has been developed to measure these magnetomechanical properties, on which several different magnetostrictive thin films on the silicon substrate cantilever were characterized. A 0.015 ppm limit of detection of the magnetostriction tester and a frequency resolution of 0.01 Hz of the ΔE tester have been achieved. After magnetic anneal treatment, a record high piezomagnetic coefficient of 12 ppm/Oe, a giant magnetic field induced Young's modulus change of 153 GPa, and a high effective magnetomechanical coupling factor of 0.84 have been measured in FeGaB thin films.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 24, 2018
- Source ID
- 10.1063/1.5065486
Entities
People
- Brandon M. Howe
- Cunzheng Dong
- Gail J. Brown
- Haomiao Zhou
- Huaihao Chen
- John G Jones
- Menghui Li
- Michael E. McConney
- Nian X Sun
- Nian X. Sun
- Xianfeng Liang
- Yuan Gao
Organizations
- Air Force Research Laboratory
- National Science Foundation
- Northeastern University
- W. M. Keck Foundation