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PII: S0304-8853(97)01155-4


    Sputtering pressure effect on the giant magnetoresistance of Fe/Cr
    superlattices

M. Velezb <#orfb>, a <#orfa>, * <#cor*> and I. K. Schullerb <#orfb>

a Dpto. Fisica de Materials, F. Fisicas, Universidad Complutense 28040
Madrid Spain
b Physics Department, University of California-San Diego La Jolla, CA
92093-0319 United States

Received 18 August 1997; revised 2 December 1997; accepted 2 December
1997. Available online 30 June 1999.


    Abstract

We have studied the magnetic, structural and transport properties of
sputtered Fe/Cr(1 1 0) superlattices as a function of the Ar pressure
during the deposition. A systematic increase in the roughness is
induced, as shown by low-angle X-ray diffraction measurements. As the Ar
pressure becomes higher, it is also found an increase in the electrical
resistivity, related with internal stresses, and a reduction in the
antiferromagnetic coupling between the layers. However, the giant
magnetoresistance (capital Delta, Greeksmall rho, Greek), normalized by
the antiferromagnetically coupled fraction of the sample, increases for
the highest Ar pressures, implying that the spin-dependent scattering
mechanisms are enhanced by roughening of the interfaces.

Author Keywords: Giant magnetoresistance; Superlattices; Spin-dependent
scattering

Index Terms: Magnetic films; Metallic superlattices; Iron; Chromium;
Sputter deposition; Magnetoresistance; Antiferromagnetism; Magnetic
properties; Pressure effects; Argon; Electric conductivity of solids;
Residual stresses; Transport properties; Spin dependent scattering

* <#bcor*>Corresponding author.

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