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Title: Microstructural evolution of Fe grown on a (001) Cu film and its implication to the elastic anomaly in metallic superlattices

Abstract

A large softening of the shear modulus has been reported in metallic superlattices composed of insoluble bcc/fcc metals. In an attempt to understand this elastic anomaly, we have studied the microstructure of Fe/Cu bilayers as a function of the Fe thickness with transmission electron microscopy (TEM). Analysis of the moire fringes observed in plan-view TEM images revealed that the fcc Fe structure epitaxially grows on the (001) Cu up to a thickness of 2.0 nm. At 2.3 nm. At 2.3 nm, the bcc Fe structure nucleates, accompanying lattice rotation around the growth direction with respect to the underlying fcc structure. As the Fe thickness further increases, the submicron polycrystalline grains formed. Based on these results, the microstructure of the metallic superlattices and its relation to the softening of the shear modulus will be discussed. 22 refs., 2 figs

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
6193625
Report Number(s):
LA-UR-90-4266; CONF-901105-51
ON: DE91005875
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Fall meeting of the Materials Research Society, Boston, MA (USA), 24 Nov - 1 Dec 1990
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON; MICROSTRUCTURE; COMPOSITE MATERIALS; COPPER; EPITAXY; SUPERLATTICES; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; ELEMENTS; FILMS; MATERIALS; METALS; MICROSCOPY; TRANSITION ELEMENTS; 360102* - Metals & Alloys- Structure & Phase Studies; 360101 - Metals & Alloys- Preparation & Fabrication

Citation Formats

Koike, J, and Nastasi, M. Microstructural evolution of Fe grown on a (001) Cu film and its implication to the elastic anomaly in metallic superlattices. United States: N. p., 1990. Web.
Koike, J, & Nastasi, M. Microstructural evolution of Fe grown on a (001) Cu film and its implication to the elastic anomaly in metallic superlattices. United States.
Koike, J, and Nastasi, M. 1990. "Microstructural evolution of Fe grown on a (001) Cu film and its implication to the elastic anomaly in metallic superlattices". United States. https://www.osti.gov/servlets/purl/6193625.
@article{osti_6193625,
title = {Microstructural evolution of Fe grown on a (001) Cu film and its implication to the elastic anomaly in metallic superlattices},
author = {Koike, J and Nastasi, M},
abstractNote = {A large softening of the shear modulus has been reported in metallic superlattices composed of insoluble bcc/fcc metals. In an attempt to understand this elastic anomaly, we have studied the microstructure of Fe/Cu bilayers as a function of the Fe thickness with transmission electron microscopy (TEM). Analysis of the moire fringes observed in plan-view TEM images revealed that the fcc Fe structure epitaxially grows on the (001) Cu up to a thickness of 2.0 nm. At 2.3 nm. At 2.3 nm, the bcc Fe structure nucleates, accompanying lattice rotation around the growth direction with respect to the underlying fcc structure. As the Fe thickness further increases, the submicron polycrystalline grains formed. Based on these results, the microstructure of the metallic superlattices and its relation to the softening of the shear modulus will be discussed. 22 refs., 2 figs},
doi = {},
url = {https://www.osti.gov/biblio/6193625}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

Conference:
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