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Talks and Poster Presentations (with Proceedings-Entry):

E. Auerbach, N. Leder, S. Gider, D. Suess, H. Arthaber:
"Characterization of Dynamic Nonlinear Effects in MTJ-Based Magnetic Sensors";
Talk: 2017 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC), Graz; 04-20-2017 - 04-21-2017; in: "Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC), 2017", (2017), 3 pages.



English abstract:
The MgO-based magnetic tunnel junction (MTJ)is the basis of modern hard disk drivesī magnetic read sensors. Within its operating bandwidth, the sensorīs performance is significantly affected by nonlinear and oscillating behavior arising from the MTJīs magnetization dynamics at microwave frequencies. Static I-V curve measurements are commonly used to characterize sensorīs nonlinear effects. Unfortunately, these do not sufficiently capture the MTJīs magnetization dynamics. In this paper, we demonstrate the use of the two-tone measurement technique for full treatment of the sensorīs nonlinear effects in conjunction with dynamic ones. This approach is new in the field of magnetism and magnetic materials, and it has its challenges due to the nature of the device. Nevertheless, the experimental results demonstrate how the two-tone measurement technique can be used to characterize magnetic sensor nonlinear properties.

Keywords:
magnetic tunnel junction (MTJ), ferromagnetic resonance (FMR), nonlinear dynamical systems, memory effects, measurement techniques, two-tone measurements


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1109/INMMIC.2017.7927309


Created from the Publication Database of the Vienna University of Technology.