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   Novel epitaxial growth and magnetotransport characterization of single
    crystal Co(11(2)over-bar-0)/Cr(100) superlattices on Mo buffer layers
    Huang JCA, Yao YD, Liou Y, Lee SF, Yang WT, Chang CP, Liao SY, Lee CH
                          APPLIED SURFACE SCIENCE
                            92: 480-483 FEB 1996

Document                                  Cited               Times
type: Article       Language: English     References: 17      Cited: 4

Abstract:
Single-crystal Co(<11(2)over bar 0>)/Cr(100) superlattices (SLs) have been
successfully grown on MgO (100) and Al2O3 (<1(1)over bar 02>) substrates
with 100 Angstrom 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 approximate to 4.8%) for [Co(40 Angstrom)/Cr(5
Angstrom)](70) SLs, giant positive MR (PMR approximate to 30%) for
[Co(5(Co))/Cr(5 Angstrom)](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.

KeyWords Plus:
GIANT MAGNETORESISTANCE, VICINAL SURFACES, DIFFUSION, FE/CR

Addresses:
Huang JCA, NATL CHENG KUNG UNIV,DEPT PHYS,TAINAN 701,TAIWAN
ACAD SINICA,INST PHYS,TAIPEI 115,TAIWAN
SYNCHROTRON RADIAT RES CTR,HSINCHU 300,TAIWAN

Publisher:
ELSEVIER SCIENCE BV, AMSTERDAM

IDS Number:
UG561

ISSN:
0169-4332
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