TY - JOUR
T1 - Microscopic analysis of the chemical reaction between Fe(Te, Se) thin films and underlying CaF2
AU - Ichinose, A.
AU - Nabeshima, F.
AU - Tsukada, I.
AU - Hanawa, M.
AU - Komiya, Seiki
AU - Akiike, T.
AU - Imai, Y.
AU - Maeda, A.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/7
Y1 - 2013/7
N2 - To understand the chemical reaction at the interface of Fe(Te, Se) and CaF2 materials, we used transmission electron microscopy to analyze five types of Fe(Te, Se) superconducting thin films prepared on different types of substrate: two on a CaF2 substrate, one on a CaF2 substrate with a CaF2 buffer layer, one on a CaF2 substrate with an FeSe buffer layer, and one on a LaAlO3 substrate with a CaF2 buffer layer. Energy-dispersive x-ray spectroscopy analysis revealed a potential interdiffusion between fluorine and selenium that plays a significant role in the variation of the lattice parameters. We conclude that the lattice parameters of the Fe(Te, Se) thin films are primarily determined by the chemical substitution of anions, while the lattice mismatch plays a secondary role.
AB - To understand the chemical reaction at the interface of Fe(Te, Se) and CaF2 materials, we used transmission electron microscopy to analyze five types of Fe(Te, Se) superconducting thin films prepared on different types of substrate: two on a CaF2 substrate, one on a CaF2 substrate with a CaF2 buffer layer, one on a CaF2 substrate with an FeSe buffer layer, and one on a LaAlO3 substrate with a CaF2 buffer layer. Energy-dispersive x-ray spectroscopy analysis revealed a potential interdiffusion between fluorine and selenium that plays a significant role in the variation of the lattice parameters. We conclude that the lattice parameters of the Fe(Te, Se) thin films are primarily determined by the chemical substitution of anions, while the lattice mismatch plays a secondary role.
UR - http://www.scopus.com/inward/record.url?scp=84878795689&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878795689&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/26/7/075002
DO - 10.1088/0953-2048/26/7/075002
M3 - Article
AN - SCOPUS:84878795689
VL - 26
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 7
M1 - 075002
ER -