TY - JOUR
T1 - Nonhysteretic vortex magnetic tunnel junction sensor with high dynamic reserve
AU - He, Guanyang
AU - Zhang, Yiou
AU - Xiao, Gang
N1 - KAUST Repository Item: Exported on 2022-06-14
Acknowledgements: The work is supported by King Abdullah University of Science and Technology (KAUST) through the Sensor Initiative. Y.Z. acknowledges support from the Fermilab-Graduate Instrumentation Research Award from DOE Award No. DE-AC05-00OR22725. We use the Heidelberg MLA150 maskless aligner, which is under the support of National Science Foundation Grant No. DMR-1827453.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2020/9/18
Y1 - 2020/9/18
N2 - Multiple geometrical conditions for different magnetic vortex states to appear in micrometer-sized magnetic tunnel junctions (MTJs) are investigated in experiment and simulation. Both results match up well, providing clear images of vortex behaviors. We pattern a compact array of single-vortex MTJ elements and perform magnetotransport and noise measurements. This sensor features nonhysteretic behavior, a small size of 0.5 × 0.5 mm2, a low normalized noise of 10-13Hz-1, a detectability of 18nT/Hz at 1 Hz, and a large dynamic range of 100 Oe. Its 115 dB broad dynamic reserve and superior stability against temperature and environmental stray fields are ideally suited for magnetic sensing applications.
AB - Multiple geometrical conditions for different magnetic vortex states to appear in micrometer-sized magnetic tunnel junctions (MTJs) are investigated in experiment and simulation. Both results match up well, providing clear images of vortex behaviors. We pattern a compact array of single-vortex MTJ elements and perform magnetotransport and noise measurements. This sensor features nonhysteretic behavior, a small size of 0.5 × 0.5 mm2, a low normalized noise of 10-13Hz-1, a detectability of 18nT/Hz at 1 Hz, and a large dynamic range of 100 Oe. Its 115 dB broad dynamic reserve and superior stability against temperature and environmental stray fields are ideally suited for magnetic sensing applications.
UR - http://hdl.handle.net/10754/678996
UR - https://link.aps.org/doi/10.1103/PhysRevApplied.14.034051
UR - http://www.scopus.com/inward/record.url?scp=85093093634&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.14.034051
DO - 10.1103/PhysRevApplied.14.034051
M3 - Article
SN - 2331-7019
VL - 14
JO - Physical Review Applied
JF - Physical Review Applied
IS - 3
ER -