title: What determines the interfacial configuration of Nb/Al2O3and Nb/MgO interface.
abstract: Nb films are deposited on single crystal Al2O3(110) and MgO(111) substrates by e-beam evaporation technique. Structure of Nb films and orientation relationships (ORs) of Nb/Al2O3and Nb/MgO interface are studied and compared by the combination of experiments and simulations. The experiments show that the Nb films obtain strong (110) texture, and the Nb film on Al2O3(110) substrate shows a higher crystalline quality than that on MgO(111) substrate. First principle calculations show that both the lattice mismatch and the strength of interface bonding play major roles in determining the crystalline perfection of Nb films and ORs between Nb films and single crystal ceramic substrates. The fundamental mechanisms for forming the interfacial configuration in terms of the lattice mismatch and the strength of interface bonding are discussed.
authors.affiliation: State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: J L
authors.initials: JL
authors.lastname: Du
authors.affiliation: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Fang
authors.affiliation: State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: E G
authors.initials: EG
authors.lastname: Fu
authors.affiliation: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
authors.forename: X
authors.initials: X
authors.lastname: Ding
authors.affiliation: Department of Materials Science and Engineering, China University of Petroleum, Beijing 102249, P. R. China.
authors.forename: K Y
authors.initials: KY
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: Y G
authors.initials: YG
authors.lastname: Wang
authors.affiliation: Experimental Physical Sciences Directorate, Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Wang
authors.affiliation: Experimental Physical Sciences Directorate, Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Baldwin
authors.affiliation: State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: P P
authors.initials: PP
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: Q
authors.initials: Q
authors.lastname: Bai