Large tunneling magnetoresistance in a field-effect transistor with a nanoscale ferromagnetic gate

J. U. Bae, T. Y. Lin, Y. Yoon, Sung Jin Kim, A. Imre, W. Porod, J. L. Reno, J. P. Bird

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We demonstrate large, and hysteretic, tunneling magnetoresistance (MR) in field-effect transistors (FETs), when their usual nonmagnetic gate is replaced with a nanoscale ferromagnet. Our analysis indicates that the enhanced MR in the tunneling regime results from the ability of the fringing magnetic fields, which emanate from the nanomagnet into the FET channel, to provide an additional modulation of the electrostatic barrier induced by the applied gate voltage. The ability of this device to detect changes in magnetization may eventually allow the implementation of reprogrammable devices for universal logic and memory applications.

Original languageEnglish
Article number253101
JournalApplied Physics Letters
Volume92
Issue number25
DOIs
StatePublished - Jul 4 2008
Externally publishedYes

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field effect transistors
logic
electrostatics
modulation
magnetization
electric potential
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Large tunneling magnetoresistance in a field-effect transistor with a nanoscale ferromagnetic gate. / Bae, J. U.; Lin, T. Y.; Yoon, Y.; Kim, Sung Jin; Imre, A.; Porod, W.; Reno, J. L.; Bird, J. P.

In: Applied Physics Letters, Vol. 92, No. 25, 253101, 04.07.2008.

Research output: Contribution to journalArticle

Bae, J. U. ; Lin, T. Y. ; Yoon, Y. ; Kim, Sung Jin ; Imre, A. ; Porod, W. ; Reno, J. L. ; Bird, J. P. / Large tunneling magnetoresistance in a field-effect transistor with a nanoscale ferromagnetic gate. In: Applied Physics Letters. 2008 ; Vol. 92, No. 25.
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