Atomic in-plane disorder in Co/Pt superlattices |
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Authors: | X Yan T Egami E E Marinero R F C Farrow C H Lee |
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Institution: | (1) Department of Material Science and Engineering, and Laboratory for Research on the Structure of Matter, University of Pennsylvania, 19104-6272 Philadelphia, PA, USA;(2) IBM Almaden Research Center, 95120-6099 San Jose, CA, USA |
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Abstract: | We have studied 111 and 001 oriented Co(3 Å)/Pt(18 Å) superlattices grown by molecular beam epitaxy via X-ray diffraction using synchrotron radiation. The diffraction peak shapes, for the scattering vector Q parallel to the film planes, were found to be characteristically different between these two films. For the 111 oriented sample, this broadening is characterized by a Lorentzian peak shape with a positional correlation length of the order of 50 Å. The data further indicate that the atomic correlation in the 111 sample has a long range orientational but only short range positional order. |
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Keywords: | 68 65 +g |
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