Journal
APPLIED PHYSICS LETTERS
Volume 118, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0035837
Keywords
-
Categories
Funding
- Singapore Ministry of Education, under its AcRF Tier 2 Grant [MOE2017-T2-2-011, MOE2018-T2-1-076]
- Industrial Post-Graduate Programme (IPP) from the Singapore Economic Development Board (EDB)
Ask authors/readers for more resources
A new spin Hall magnetoresistance (SMR) sensor has been developed with inherent frequency selectivity for applications in eddy current testing, allowing detection of surface cracks on an aluminum plate down to 0.2mm without the need for sophisticated detection circuitry.
Recently, we have developed a spin Hall magnetoresistance (SMR) sensor using the spin-orbit torque effective field as the built-in linearization mechanism, which allows us to achieve a linear, zero-offset, and low-noise magnetic field sensor without any dedicated magnetic bias. In this work, we examine the response of the SMR sensor to a time-varying magnetic field and demonstrate that its inherent frequency selectivity makes it uniquely suited for applications in eddy current testing. By applying a square wave current to both the coil and the sensor, and with the help of principal component analysis, we show that it is possible to detect surface cracks on an aluminum plate with dimensions down to 0.2mm, without the need to use any sophisticated detection circuitry.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available