Novel epitaxial growth and magnetotransport characterization of single crystal Co(1120)/Cr(100) superlattices on Mo buffer layers

J. C.A. Huang, Y. D. Yao, Y. Liou, S. F. Lee, W. T. Yang, C. P. Chang, S. Y. Liao, C. H. Lee

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6 Citations (Scopus)

Abstract

Single-crystal Co(1120)/Cr(100) superlattices (SLs) have been successfully grown on MgO (100) and Al 2 O 3 (1102) substrates with 100 Å Mo as buffer layers by molecular beam epitaxy (MBE). Excellent epitaxial growth was evidenced by reflection high-energy electron diffraction (RHEED). Magneto-resistance (MR) measurements have been performed using a conventional four-point technique. We have observed negative MR (NMR ≈ 4.8%) for [Co(40 Å)/Cr(5 Å)] 70 SLs, giant positive MR (PMR ≈ 30%) for [Co(5 Co )/Cr(5 Å)] 100 SLs. It is likely that the NMR effect is introduced by the Co/Cr SL while PMR is induced by the Mo buffer layers. Interestingly, PMR samples show a distinct roughness effect compared to NMR samples. Systematically we have found that NMR increases with increasing interfacial roughness, while PMR samples show the opposite behavior.

Original languageEnglish
Pages (from-to)480-483
Number of pages4
JournalApplied Surface Science
Volume92
DOIs
Publication statusPublished - 1996 Feb

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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