Substantial enhancement in the performance of a spin valve through the ultra-thin insertion of partially oxidized Fe

Jangsik In, Yoonsung Han, Jaechul Shim, Sunghoon Kim, Jongill Hong

Research output: Contribution to journalArticle

Abstract

We found that the ultra-thin insertion of a mix of Fe and Fe oxide in the pinned layer substantially enhanced the performance of a spin valve. With the exchange bias field kept large, the giant magnetoresistance (GMR) reached 11.3%, which corresponded to a 46% increase in GMR compared with the GMR of spin valves without the insertion. We attribute this considerable enhancement to spin-dependent scattering boosted by the combined effect of the modified local electronic structures at the Fe and specular reflections at the α-Fe 2O3 of the insertion.

Original languageEnglish
Article number004
Pages (from-to)3038-3042
Number of pages5
JournalJournal of Physics D: Applied Physics
Volume40
Issue number10
DOIs
Publication statusPublished - 2007 May 21

Fingerprint

Giant magnetoresistance
insertion
augmentation
specular reflection
Oxides
Electronic structure
Scattering
electronic structure
oxides
scattering

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

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abstract = "We found that the ultra-thin insertion of a mix of Fe and Fe oxide in the pinned layer substantially enhanced the performance of a spin valve. With the exchange bias field kept large, the giant magnetoresistance (GMR) reached 11.3{\%}, which corresponded to a 46{\%} increase in GMR compared with the GMR of spin valves without the insertion. We attribute this considerable enhancement to spin-dependent scattering boosted by the combined effect of the modified local electronic structures at the Fe and specular reflections at the α-Fe 2O3 of the insertion.",
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Substantial enhancement in the performance of a spin valve through the ultra-thin insertion of partially oxidized Fe. / In, Jangsik; Han, Yoonsung; Shim, Jaechul; Kim, Sunghoon; Hong, Jongill.

In: Journal of Physics D: Applied Physics, Vol. 40, No. 10, 004, 21.05.2007, p. 3038-3042.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Substantial enhancement in the performance of a spin valve through the ultra-thin insertion of partially oxidized Fe

AU - In, Jangsik

AU - Han, Yoonsung

AU - Shim, Jaechul

AU - Kim, Sunghoon

AU - Hong, Jongill

PY - 2007/5/21

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AB - We found that the ultra-thin insertion of a mix of Fe and Fe oxide in the pinned layer substantially enhanced the performance of a spin valve. With the exchange bias field kept large, the giant magnetoresistance (GMR) reached 11.3%, which corresponded to a 46% increase in GMR compared with the GMR of spin valves without the insertion. We attribute this considerable enhancement to spin-dependent scattering boosted by the combined effect of the modified local electronic structures at the Fe and specular reflections at the α-Fe 2O3 of the insertion.

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