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arXiv · 0812.4421

Specific Resistance of Pd/Ir Interfaces

R. Acharyya·H. Y. T. Nguyen·R. Loloee·W. P. Pratt Jr.·J. Bass·Shuai Wang·Ke Xia
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Abstract

From measurements of the current-perpendicular-to-plane (CPP) total specific resistance (AR = area times resistance) of sputtered Pd/Ir multilayers, we derive the interface specific resistance, 2AR(Pd/Ir) = 1.02 +/- 0.06 fOhmm^2, for this metal pair with closely similar lattice parameters. Assuming a single fcc crystal structure with the average lattice parameter, no-free-parameter calculations, including only spd orbitals, give for perfect interfaces, 2AR(Pd/Ir)(Perf) = 1.21 +/-0.1 fOhmm^2, and for interfaces composed of two monolayers of a random 50%-50% alloy, 2AR(Pd/Ir)(50/50) = 1.22 +/- 0.1 fOhmm^2. Within mutual uncertainties, these values fall just outside the range of the experimental value. Updating to add f-orbitals gives 2AR(Pd/Ir)(Perf) = 1.10 +/- 0.1 fOhmm^2 and 2AR(Pd/Ir)(50-50) = 1.13 +/- 0.1 fOhmm^2, values now compatible with the experimental one. We also update, with f-orbitals, calculations for other pairs

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R. Acharyya, H. Y. T. Nguyen, R. Loloee, W. P. Pratt Jr., J. Bass, Shuai Wang, Ke Xia. 2008-12-23. Specific Resistance of Pd/Ir Interfaces. https://doi.org/10.1063/1.3072365

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