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Design and evaluate a thin-film Permalloy magnetoresistive transducer for high-efficiency, velocity-independent detection of magnetic bubble domains.

March 15, 1971Journal of Applied Physics

Magnetoresistive Detector for Bubble Domains

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Authors

GAGeorge AlmásiIBM (United States)GKG. E. KeefeIBM Research - Thomas J. Watson Research Center YLYu-Kun LinFeng Chia University

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Implication

Experimental evaluation demonstrates high-efficiency magnetoresistive readout of magnetic bubble domains, indicating a simplified, high-speed alternative to inductive and Hall effect sensors.

Key Points

Design and evaluate a thin-film Permalloy magnetoresistive transducer for high-efficiency, velocity-independent detection of magnetic bubble domains.
Fabricated a 250 Å × 38 μm × 138 μm thin-film Permalloy detector strip (52 Ω) integrated directly on the propagation overlay.
Tested detector signal output under a 7 mA bias current using 138-μm diameter bubbles in TmFeO3 and measured frequency limits in DyFeO3.
Generated a 2.3-mV readout signal for 138-μm bubbles in TmFeO3 with output amplitude independent of bubble velocity.
Maintained constant signal response up to data rates of 10⁶ bits/sec in DyFeO3, with intrinsic detector switching speeds under 10⁻⁸ seconds.
Demonstrated device compatibility with both conducting stripline and rotating field Permalloy propagation overlays.

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Almási et al. (1971) studied this question.

synapsesocial.com/papers/6a712939e5469ee92be1c428 https://doi.org/10.1063/1.1660205

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Implication

Experimental evaluation demonstrates high-efficiency magnetoresistive readout of magnetic bubble domains, indicating a simplified, high-speed alternative to inductive and Hall effect sensors.

Magnetoresistive Detector for Bubble Domains

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Implication

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Cite This Study

Magnetoresistive Detector for Bubble Domains

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Implication

Key Points

Cite This Study

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