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000029229 084__ $$2WoS$$aPhysics, Applied
000029229 1001_ $$0P:(DE-Juel1)VDB10308$$aPaul, A.$$b0$$uFZJ
000029229 245__ $$aOptimizing the giant magnetoresistance of NiFe/Cu/Co pseudo spin-valves prepared by magnetron sputtering
000029229 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2003
000029229 300__ $$a1905 - 1907
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000029229 440_0 $$0562$$aApplied Physics Letters$$v82$$x0003-6951$$y12
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000029229 520__ $$aWe study the dependence of magnetic and magnetotransport properties of NiFe/Cu/Co pseudo spin-valves on the pressure of the Ar sputtering gas during magnetron deposition. The giant magnetoresistance (GMR) ratio as a function of the sputtering pressure behaves nonmonotonically with a maximum of about 4% at an intermediate pressure of 0.87x10(-2) mbar. Magneto-optic Kerr-effect measurements reveal different coercive fields and independent switching of the Co and NiFe layers. The structural characterization by x-ray scattering shows no significant pressure dependence. However, we observe by atomic force microscopy a variation of the grain structure with increasing sputtering pressure; the grain size first decreases and then the grains start clustering for highest pressures. The reduced coercive field and the lower GMR ratio indicate that the clustered grains have weaker magnetic pinning and increased spin-independent scattering. (C) 2003 American Institute of Physics.
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000029229 7001_ $$0P:(DE-Juel1)VDB10436$$aDamm, T.$$b1$$uFZJ
000029229 7001_ $$0P:(DE-Juel1)130582$$aBürgler, D. E.$$b2$$uFZJ
000029229 7001_ $$0P:(DE-Juel1)VDB3112$$aStein, S.$$b3$$uFZJ
000029229 7001_ $$0P:(DE-Juel1)VDB3107$$aKohlstedt, H.$$b4$$uFZJ
000029229 7001_ $$0P:(DE-Juel1)VDB10459$$aGrünberg, P. A.$$b5$$uFZJ
000029229 773__ $$0PERI:(DE-600)1469436-0$$a10.1063/1.1563056$$gVol. 82, p. 1905 - 1907$$p1905 - 1907$$q82<1905 - 1907$$tApplied physics letters$$v82$$x0003-6951$$y2003
000029229 8567_ $$uhttp://hdl.handle.net/2128/1223$$uhttp://dx.doi.org/10.1063/1.1563056
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