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(a) Schematic diagram of the device. (b) Scanning electron microscope image of device with four contacts. (c) The AMR of a typical device.
(a) dc voltage measured at as a function of using the frequency modulation technique, where each curve represents , with increasing in increments, and always . The curves are offset by for clarity. (b) The peak at for a number of currents between and . (c) The peak height from the data in (b) plotted vs the current. The line is a linear fit to the data.
(a) Resonant peaks at various frequencies ranging from in steps as a function of the field normalized to the frequency. Solid lines are the fits of Eq. (3) to the data. (b) The frequency of the peak vs its center position . The line is a fit of Eq. (2) to the data. (c) The field calculated from the fit coefficients to the data in (a) and (b) as a function of frequency.
Voltage peaks at (left) and at (right) without any applied dc current for different angles between the and the long axis of the strip. Solid lines are fits of Eq. (4) to the data.
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