Magnetoresistance after initial demagnetization in La0.67 Sr0.33 Mn O3 SrTi O3 La0.67 Sr0.33 Mn O3 magnetic tunnel junctions

E. T. Wertz, Q. Li

Research output: Contribution to journalArticle

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Abstract

Magnetic tunnel junctions were fabricated from La0.67 Sr0.33 Mn O3 (LSMO) SrTi O3 La0.67 Sr0.33 Mn O3 heterostructures. Junctions initially demagnetized at 5 K with an in-plane magnetic field showed larger tunneling magnetoresistance (TMR) and sharper switching than standard TMR scans. Magnetoresistive switching from the demagnetized state was stable in fields <80 G yielding a TMR of 475% and a ΔMRΔH≈200%G. Changes in resistance achievable at <500 G yielded a TMR of ≈850%. A similar TMR was seen when rotating the magnetic field from an in-plane to out-of-plane orientation. The demagnetized high resistance state may indicate that the LSMO layers preferentially choose a more efficient opposite magnetic domain alignment.

Original languageEnglish (US)
Article number142506
JournalApplied Physics Letters
Volume90
Issue number14
DOIs
StatePublished - Apr 13 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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