EPITAXIAL KNBO3 THIN-FILMS ON KTAO3, MGAL2O4, AND MGO SUBSTRATES

Authors
CHOW AF LICHTENWALNER DJ WOOLCOTT RR GRAETTINGER TM AUCIELLO O KINGON AI BOATNER LA PARIKH NR
Citation
Af. Chow et al., EPITAXIAL KNBO3 THIN-FILMS ON KTAO3, MGAL2O4, AND MGO SUBSTRATES, Applied physics letters, 65(9), 1994, pp. 1073-1075
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
65
Issue
9
Year of publication
1994
Pages
1073 - 1075
Database
ISI
SICI code
0003-6951(1994)65:9<1073:EKTOKM>2.0.ZU;2-A
Abstract
Epitaxial potassium niobate (KNbO3) thin films have been deposited on KTaO3 (100), MgAl2O4 (100), and MgO (100) substrates using ion-beam sp utter deposition. X-ray-diffraction results show that KNbO3 films have orthorhombic (110) orientation on all three substrates. Rutherford ba ckscattering channeling analysis of KNbO3 films on KTaO3, MgAl2O4, and MgO exhibits minimum scattering yields (chi(min)) of 7%, 9%, and 18% for the Nb peak, respectively. This illustrates how the quality of epi taxy improves as the lattice mismatch decreases. Prism-coupling measur ements reveal near-bulk refractive indices of about 2.27 for TE modes and 2.22 for TM modes for films on each substrate.