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Characterization of magnetomechanical properties in FeGaB thin films

Authors :
Gail J. Brown
Michael E. McConney
Nian X. Sun
Brandon M. Howe
Xinjun Wang
Haomiao Zhou
Yuan Gao
Xianfeng Liang
Menghui Li
Cunzheng Dong
John G. Jones
Huaihao Chen
Source :
Applied Physics Letters. 113:262401
Publication Year :
2018
Publisher :
AIP Publishing, 2018.

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.

Details

ISSN :
10773118 and 00036951
Volume :
113
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........cde3f23f6da487dec39f2050c7d43623
Full Text :
https://doi.org/10.1063/1.5065486