Lumped-element RC model for high-data-rate thin-film heads

We have developed a lumped-element model for a thin-film giant magnetoresistive head with an inductive writer and used it to study the effect on the data rate capability. Our work shows that the reader can be approximated well by a resistor (R/sub eff/) and a capacitor (C/sub eff/) in parallel. The...

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Veröffentlicht in:IEEE transactions on magnetics 2003-03, Vol.39 (2), p.1053-1058
Hauptverfasser: Dimitrov, D.V., Rea, C., Klarqvist, K., Subramanian, K., Mack, A.
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container_end_page 1058
container_issue 2
container_start_page 1053
container_title IEEE transactions on magnetics
container_volume 39
creator Dimitrov, D.V.
Rea, C.
Klarqvist, K.
Subramanian, K.
Mack, A.
description We have developed a lumped-element model for a thin-film giant magnetoresistive head with an inductive writer and used it to study the effect on the data rate capability. Our work shows that the reader can be approximated well by a resistor (R/sub eff/) and a capacitor (C/sub eff/) in parallel. The paper discusses the relative importance of different contributors to C/sub eff/ and addresses the effect of C/sub eff/ on the spectrum of the read-back signal and the electrical reader pulsewidth (PW50) in detail. The model predictions and spin-stand data agree reasonably well. The paper also reports on our study of the amount of writer-to-reader coupling in the transducer. Our work points out the importance of minimizing the parasitic capacitance between elements in the writer and reader and avoiding direct coupling between the writer and reader leads.
doi_str_mv 10.1109/TMAG.2003.808593
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subjects Applied sciences
Approximation
Capacitors
Couplings
Electronics
Exact sciences and technology
Giant magnetoresistance
Information retrieval
Joining
Magnetic devices
Magnetic heads
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.)
domain-motion devices, etc
Magnetism
Mathematical models
Parasitic capacitance
Predictive models
Readers
Reinforced concrete
Resistors
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Space vector pulse width modulation
Thin films
Transducers
Transistors
title Lumped-element RC model for high-data-rate thin-film heads
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