Microwave Phase Shifters: Epitaxial Growth by Pulsed Laser Deposition of Dielectric Ba0.5Sr0.5TiO3 Thin Films on MgO

2005 ◽  
Vol 902 ◽  
Author(s):  
YauYau Tse ◽  
P. S. Suherman ◽  
T. J. Jackson ◽  
I. P. Jones
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Strain Relaxation ◽  
Pulsed Laser ◽  
Phase Shifters ◽  
Laser Deposition ◽  
Ex Situ ◽  
Misfit Dislocations ◽  
Epitaxial Relationship

AbstractBa0.5Sr0.5TiO3 (BSTO) thin films were grown on (001) MgO using pulsed-laser deposition (PLD). The microstructures of in-situ and ex-situ annealed BSTO films were studied by X-ray diffraction and transmission electron microscopy (TEM). The films showed a cube on cube epitaxial relationship with <100> BSTO // <100> MgO. They were essentially single crystals with a columnar structure and possessed smooth surfaces. The interfaces of the BSTO films and substrates were atomically sharp, with misfit dislocations. Better crystallinity and full strain relaxation was obtained in films grown in 10-1 mbar oxygen and annealed ex-situ. A 30% increase in dielectric tuneability was achieved compared with in-situ annealing and deposition at 10-4 mbar. Threading dislocations are the dominant defects in the films grown in 10-1 mbar oxygen and annealed ex-situ, while the films with in-situ annealing show columnar structures with low angle boundaries.

Synthesis of BiSrCaCuO thin films by in situ and ex situ pulsed laser deposition

1993 ◽  
Vol 6 (7) ◽  
pp. 490-496 ◽  
Author(s):  
M Viret ◽  
J F Lawler ◽  
J G Lunney
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Ex Situ

Luminescent Characteristics of Pulsed Laser Deposited Epitaxial Eu-Doped Y2O3 Films

1999 ◽  
Vol 574 ◽  
Author(s):  
D. Kumar ◽  
K. G. Cho ◽  
Zhang Chen ◽  
V. Craciun ◽  
P. H. Holloway ◽  
...  
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Epitaxial Growth ◽  
Yttrium Oxide ◽  
Lattice Mismatch ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Deposition Technique ◽  
Deposition Parameters

AbstractThe growth, structural and cathodoluminescent (CL) properties of europium activated yttrium oxide (Eu:Y2O3) thin films are reported. The Eu:Y2O3 films were grown in-situ using a pulsed laser deposition technique. Our results show that Eu:Y2O3 films can grow epitaxially on (100) LaAlO3 substrates under optimized deposition parameters. The epitaxial growth of Eu:Y2O3 films on LaAlO3, which has a lattice mismatch of ∼ 60 %, is explained by matching of the atom positions in the lattices of the film and the substrate after a rotation. CL data from these films are consistent with highly crystalline Eu:Y2O3 films with an intense CL emission at 611 nm.

Pulsed Laser Deposition of High-Quality Manganite Thin Films at Low Background Pressures with in-situ Reflection High Energy Electron Diffraction

2019 ◽  
Vol 3 (9) ◽  
pp. 55-63 ◽  
Author(s):  
Antonello Tebano ◽  
Carmela Aruta ◽  
Pier Gianni Medaglia ◽  
Giuseppe Balestrino ◽  
Norberto G. Boggio ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Diffraction ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
High Energy ◽  
Laser Deposition ◽  
High Energy Electron ◽  
High Quality ◽  
Low Background

Microwave Properties of Strontium Barium Niobate Thin Films Grown by Pulsed Laser Deposition

2001 ◽  
Vol 688 ◽  
Author(s):  
Víctor Rodríguez-Santiago ◽  
Yelitza González ◽  
Félix E. Fernández ◽  
Carl H. Mueller ◽  
Fred W. Van Keuls ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Pulsed Laser Deposition ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Phase Shifters ◽  
Laser Deposition ◽  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
High Frequencies

AbstractStrontium barium niobate (SrxBa1−xNb2O6 - SBN) with 0.25≤x≤0.75 is a ferroelectric material of interest for diverse optoelectronic applications. Dielectric properties of bulk SBN crystals were comprehensively studied over 30 years ago for a range of compositions and at frequencies up to 30 MHz, but there is little information on properties at higher frequencies. In particular, and up to the best of our knowledge, there are no published results about SBN thin film dielectric properties at high frequencies. For the study reported here, SBN thin films with x = 0.61 were grown on MgO and LaAlO3 substrates by Pulsed Laser Deposition (PLD). Films with good crystallinity and oriented with c-axis normal to the substrate surface were obtained on both types of substrates, while films on MgO had much better texture due to better lattice matching. Interdigital electrode (IDE) capacitors and coupled microstrip phase shifters (CMPS) were fabricated with both types of samples in order to study dielectric response. Capacitance of the IDE capacitors was measured at 1 MHz as a function of temperature and bias voltage, revealing very low losses but poor capacitance tunability, particularly for samples on MgO. Response of the CMPS structures was measured at room temperature and at high frequencies, up to 21 GHz. Insertion losses were measured up to 28 GHz.

In situ grown epitaxial YBa2Cu3O7−x thin films by pulsed laser deposition under reduced oxygen pressure during cool-down time

2006 ◽  
Vol 252 (13) ◽  
pp. 4573-4577 ◽  
Author(s):  
Maria Branescu ◽  
A. Vailionis ◽  
I. Ward ◽  
J. Huh ◽  
G. Socol
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Oxygen Pressure ◽  
Pulsed Laser ◽  
Laser Deposition

In-situ fabrication of Y-Ba-Cu-oxide thin films by pulsed laser deposition

1991 ◽  
Vol 27 (2) ◽  
pp. 1459-1462 ◽  
Author(s):  
R.M. Bowman ◽  
A.I. Ferguson ◽  
C.M. Pegrum
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Oxide Thin Films ◽  
In Situ Fabrication

Epitaxial growth of CaF2 thin films on (100) GaAs by pulsed-laser deposition and in-situ annealing

1991 ◽  
Vol 12 (5) ◽  
pp. 335-338 ◽  
Author(s):  
S.S. Shushtarian ◽  
S.B. Ogale ◽  
G.N. Chaudhari ◽  
P. Singh ◽  
V.J. Rao
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Epitaxial Growth ◽  
Pulsed Laser ◽  
Laser Deposition
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