Microstructural evolution in PtMn-based spin-valves induced by heat treatment

Hyuck Soo Yang, K. I. Min, Young-geun Kim, Seong Rae Lee, Gyeong Su Park, Se Ahn Song

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2 Citations (Scopus)

Abstract

Annealing time effect on the magnetotransport properties was investigated for Si/alumina/Ta/NiFe/CoFe/Cu/ CoFe/PtMn/Ta samples having different PtMn thickness (10-30 nm). Post-deposition heat treatment was performed using a vacuum furnace with 3 kOe field at 270°C up to 35 h. The thermally activated atoms diffused, to other layers through grain boundaries during the heat treatment with longer annealing hours resulting in deteriorating ΔR/R. This effect is more profound in films with thicker PtMn layers where interface became rougher after annealing.

Original languageEnglish
Pages (from-to)2070-2072
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume226-230
Issue numberPART II
Publication statusPublished - 2001 Dec 1

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Keywords

  • Annealing
  • Giant magnetoresistance
  • Microstructure
  • Spin value

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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