Epitaxial KNbO[sub 3] thin films on KTaO[sub 3], MgAl[sub 2]O[sub 4], and MgO substrates

Journal Article · Mon Aug 29 04:00:00 EDT 1994 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.112129· OSTI ID:7149709

Chow, A F; Lichtenwalner, D J; Woolcott, Jr, R R; Graettinger, T M; Auciello, O; Kingon, A I ^[1]; Boatner, L A ^[2]; Parikh, N R ^[3]

---

1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7919 (United States)
2. Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831-6056 (United States)
3. Department of Physics, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)

Epitaxial potassium niobate (KNbO[sub 3]) thin films have been deposited on KTaO[sub 3] (100), MgAl[sub 2]O[sub 4] (100), and MgO (100) substrates using ion-beam sputter deposition. X-ray-diffraction results show that KNbO[sub 3] films have orthorhombic (110) orientation on all three substrates. Rutherford backscattering channeling analysis of KNbO[sub 3] films on KTaO[sub 3], MgAl[sub 2]O[sub 4], and MgO exhibits minimum scattering yields ([chi][sub min]) of 7%, 9%, and 18% for the Nb peak, respectively. This illustrates how the quality of epitaxy improves as the lattice mismatch decreases. Prism-coupling measurements reveal near-bulk refractive indices of about 2.27 for TE modes and 2.22 for TM modes for films on each substrate.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7149709
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 65:9; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
CHANNELING
COHERENT SCATTERING
CRYSTAL STRUCTURE
DEPOSITION
DIFFRACTION
EPITAXY
FILMS
INTERFACES
ION CHANNELING
MORPHOLOGY
NIOBATES
NIOBIUM COMPOUNDS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
REFRACTIVE INDEX
REFRACTORY METAL COMPOUNDS
SCATTERING
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION