title: Scaling of the interface roughness in Fe-Cr superlattices: self-affine versus non-self-affine.
abstract: We have analyzed kinetic roughening in Fe-Cr superlattices by energy-filtered transmission electron microscopy. The direct access to individual interfaces provides both static and dynamic roughness exponents. We find an anomalous non-self-affine scaling of the interface roughness with a time dependent local roughness at short length scales. While the deposition conditions affect strongly the long-range dynamics, the anomalous short-range exponent remains unchanged. The different short- and long-range dynamics outline the importance of long-range interactions in kinetic roughening.
authors.affiliation: Department of Physics, University of California-San Diego, La Jolla, California 92093-0319, USA.
authors.forename: J
authors.initials: J
authors.lastname: Santamaria
authors.forename: M E
authors.initials: ME
authors.lastname: Gómez
authors.forename: J L
authors.initials: JL
authors.lastname: Vicent
authors.forename: K M
authors.initials: KM
authors.lastname: Krishnan
authors.forename: Ivan K
authors.initials: IK
authors.lastname: Schuller