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Nanocontact Measurements in Superlattices

Published online by Cambridge University Press:  26 February 2011

T. Baumann ,
J. B. Pethica ,
M. Grimsditch  and
Ivan K. Schuller
T. Baumann
Affiliation:
Brown Boveri Research Center, 5405 Baden, Switzerland
J. B. Pethica
Affiliation:
Brown Boveri Research Center, 5405 Baden, Switzerland
M. Grimsditch
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
Ivan K. Schuller
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Many metallic superlattices are known to exhibit dramatic anomalous elastic properties as a function of modulation wavelength. All measurements to date measure either a shear modulus or a longitudinal modulus in the superlattice plane. Here we present a method which also probes longitudinal elastic behavior perpendicular to the layers using a nano-hardness tester. In this method, a diamond tip is indented into the material and both the indentation depth and applied force are constantly monitored during loading and unloading. The elastic properties are extracted from the unloading part of the force versus displacement curve. Contrary to the anomaly found in a shear modulus, no anomaly in Young's modulus was found in the present study on Mo/Ni superlattices.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 77: Symposium D – Interfaces, Superlattices, and Thin Films , 1986 , 527
Copyright
Copyright © Materials Research Society 1987

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References

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