4. In a GMR device, estimate the percentage change of resistance for the two layers being parallel vs. antiparallel assuming that for the magnetic layers, the resistance for spin up p↑ is five times higher than for spin down p₁.

4. In a GMR device, estimate the percentage change of resistance for the two layers being parallel vs. antiparallel assuming that for the magnetic layers, the resistance for spin up p↑ is five times higher than for spin down p₁.

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter32: Inductance

Section: Chapter Questions

Problem 32.74AP

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

4. In a GMR device, estimate the percentage change of resistance for the two layers being
parallel vs. antiparallel assuming that for the magnetic layers, the resistance for spin up p₁ is five
times higher than for spin down P↓.

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