NDLI: Stretching and sensing of 1-µm bubbles in ion-implanted contiguous disk devices  

Content Provider	IEEE Xplore Digital Library
Author	Mazzeo, N. Sanders, I. Kryder, M. Deutsch, A.
Copyright Year	1965
Abstract	A sensor-stretcher designed for use in ion-implanted contiguous disk devices is described. The current activated stretcher forms part of a self-aligned circuit and is defined simultaneously with the propagation structure. The sensor is a thin Permalloy stripe, 100 μm in length, adjacent to the stretch conductor. Detection of 1 μm diameter bubbles has been achieved at frequencies up to 146 kHz, over a 30-Oe (10 percent) bias field margin. The figure of merit, ΔV/V, for the detector was relatively independent of sensor width in the range 2.5- 10 μm and was ∼0.30%; maximum output was ∼10 mV. Noise resulting from imperfect balance of active and dummy detector was found to be a problem in narrow detectors (< 10 μm) due to high coercivity. However, the coercivity may be reduced substantially by in-situ passivation with a 70 Å Si layer. Stroboscopic observation of bubble stretching indicates expansion velocities of 20-90 m/s, (depending on drive) in representative EuTmGaIG/GdYTmGaIG composites. The stretch current pulse for reliable expansion is a function of the magnitude and phase of the in-plane rotating field and is typically 200 mA, 2.5 μs.
Sponsorship	IEEE Magnetics Society
Starting Page	1905
Ending Page	1910
Page Count	6
File Size	825448
File Format	PDF
ISSN	00189464
Volume Number	15
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1979-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Conductors Garnets Frequency Coercive force Fabrication Magnetic sensors Circuit testing Active noise reduction Phase detection
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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