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Title: Exchange coupling between ferromagnetic and antiferromagnetic layers via Ru and application for a linear magnetic field sensor

Abstract

Exchange coupling is observed in a trilayer structure of ferromagnet-Ru-antiferromagnet and the coupling strength is found to be a function of the thickness of the Ru spacer layer. This is the first observation for such a trilayer structure and may help to shed light on the illusive mechanism of exchange coupling in these systems. This unique coupling is used to bias the sense layer in a magnetic tunnel junction structure so that the magnetization orientations of the sense layer and the pinned layer can be independently controlled. Sensor devices are fabricated with a bipolar output, a medium sensitivity, and a wide field range. The results show that this biasing scheme is well suited for magnetic tunnel junctions used in magnetic field sensors.

Authors:
; ; ; ;  [1]
  1. NVE Corporation, 11409 Valley View Road, Eden Prairie, Minnesota 55344 (United States)
Publication Date:
OSTI Identifier:
20788135
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 99; Journal Issue: 8; Other Information: DOI: 10.1063/1.2162507; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; EXCHANGE INTERACTIONS; FERROMAGNETIC MATERIALS; LAYERS; MAGNETIC FIELDS; MAGNETIZATION; RUTHENIUM; SUPERCONDUCTING JUNCTIONS; THICKNESS; TUNNEL EFFECT

Citation Formats

Wang Dexin, Daughton, Jim, Nordman, Cathy, Eames, Pete, and Fink, Jon. Exchange coupling between ferromagnetic and antiferromagnetic layers via Ru and application for a linear magnetic field sensor. United States: N. p., 2006. Web. doi:10.1063/1.2162507.
Wang Dexin, Daughton, Jim, Nordman, Cathy, Eames, Pete, & Fink, Jon. Exchange coupling between ferromagnetic and antiferromagnetic layers via Ru and application for a linear magnetic field sensor. United States. doi:10.1063/1.2162507.
Wang Dexin, Daughton, Jim, Nordman, Cathy, Eames, Pete, and Fink, Jon. Sat . "Exchange coupling between ferromagnetic and antiferromagnetic layers via Ru and application for a linear magnetic field sensor". United States. doi:10.1063/1.2162507.
@article{osti_20788135,
title = {Exchange coupling between ferromagnetic and antiferromagnetic layers via Ru and application for a linear magnetic field sensor},
author = {Wang Dexin and Daughton, Jim and Nordman, Cathy and Eames, Pete and Fink, Jon},
abstractNote = {Exchange coupling is observed in a trilayer structure of ferromagnet-Ru-antiferromagnet and the coupling strength is found to be a function of the thickness of the Ru spacer layer. This is the first observation for such a trilayer structure and may help to shed light on the illusive mechanism of exchange coupling in these systems. This unique coupling is used to bias the sense layer in a magnetic tunnel junction structure so that the magnetization orientations of the sense layer and the pinned layer can be independently controlled. Sensor devices are fabricated with a bipolar output, a medium sensitivity, and a wide field range. The results show that this biasing scheme is well suited for magnetic tunnel junctions used in magnetic field sensors.},
doi = {10.1063/1.2162507},
journal = {Journal of Applied Physics},
number = 8,
volume = 99,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}