Noncollinear spin valve effect in ferromagnetic semiconductor trilayers

G. Xiang, B. L. Sheu, M. Zhu, P. Schiffer, N. Samarth

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We report the observation of the spin valve effect in (Ga,Mn) As/p-GaAs/ (Ga,Mn) As trilayer devices. Magnetoresistance measurements carried out in the current-in-plane geometry reveal positive magnetoresistance peaks when the two ferromagnetic layers are magnetized orthogonal to each other. Measurements carried out for different postgrowth annealing conditions and spacer layer thicknesses suggest that the positive magnetoresistance peaks originate in a noncollinear spin valve effect due to spin-dependent scattering that is believed to occur primarily at interfaces.

Original languageEnglish (US)
Article number035324
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number3
DOIs
StatePublished - Jul 19 2007

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Magnetoresistance
Semiconductor materials
spacers
Scattering
Annealing
annealing
Geometry
geometry
scattering

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Noncollinear spin valve effect in ferromagnetic semiconductor trilayers. / Xiang, G.; Sheu, B. L.; Zhu, M.; Schiffer, P.; Samarth, N.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 3, 035324, 19.07.2007.

Research output: Contribution to journalArticle

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AU - Xiang, G.

AU - Sheu, B. L.

AU - Zhu, M.

AU - Schiffer, P.

AU - Samarth, N.

PY - 2007/7/19

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AB - We report the observation of the spin valve effect in (Ga,Mn) As/p-GaAs/ (Ga,Mn) As trilayer devices. Magnetoresistance measurements carried out in the current-in-plane geometry reveal positive magnetoresistance peaks when the two ferromagnetic layers are magnetized orthogonal to each other. Measurements carried out for different postgrowth annealing conditions and spacer layer thicknesses suggest that the positive magnetoresistance peaks originate in a noncollinear spin valve effect due to spin-dependent scattering that is believed to occur primarily at interfaces.

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