Linear Spin-Valve Bridge Sensing Devices

Abstract

Spin-valves are applied in a variety of devices including magnetic sensors and isolators. The linear spinvalve sensing element is configured as a Wheatstone bridge consisting of four sensing resistors. The sensing devices are characterized by three parameters: the sensing field range, sensitivity and linearity. The devices using linear spin-valve sensing elements exhibit excellent performance. A Linear magnetic field sensor constructed of a bridge with 4 m wide line serpentine resistors shows a sensitivity of 1.6 mV/V-Oe in the operation range of 5 Oe to 5 Oe. An analog magnetic isolator constructed of a bridge with 4 m wide line serpentine resistors exhibits superior performance with a sensitivity of 1.27 mV/V-mA and a linearity error less than 0.05%.

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 2003
Accession Number
ADA451723

Entities

People

  • Anthony Popple
  • Cathy Nordman
  • Dexin Wang
  • Jim Daughton
  • Mark Tondra
  • Zhenghong Qian

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Anisotropy
  • Chemical Etching
  • Detectors
  • Domain Walls
  • Dynamic Range
  • Electronic Mail
  • Fabrication
  • Feedback
  • Hysteresis
  • Information Operations
  • Ion Beams
  • Linearity
  • Magnetic Detectors
  • Magnetic Fields
  • Resistors
  • Sensitivity

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