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(Color online) ME signal vs ac field. The slope of the curve indicates that the sensor has a sensitivity of over an ac field range of . The inset shows a calibration scan of a ME device. The peak in ME signal is at an applied dc field of with an of .
(Color online) A schematic of the scanning near-field magnetic field probe setup. The dc field is applied parallel to the field annealed axis of the Metglas. A motion control program is used to scan the sensor across the ring. The active part of the trilayer device is shown.
A one-dimensional (1D) scan of a ring carrying a current of . The cross section of the wires of the ring is shown to denote the wire position, but is not to scale.
A series of line scans taken for different through the ring. The data have been multiplied by 1, 5, and 30 for , , and , respectively. The cross section of the wires of the ring is shown to denote the wire position, but is not to scale.
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