Candidate HTSC Film Substrates of Complex Oxide Perovsk1te Compositions

1994 ◽  
Vol 341 ◽  
Author(s):  
Ruyan Guo ◽  
A. S. Bhalla ◽  
Rustum Roy ◽  
L. E. Cross
Keyword(s):  
Complex Oxide ◽  
Crystallographic Structure ◽  
Crystal Fiber ◽  
Growth System ◽  
Yttrium Barium ◽  
Htsc Film ◽  
New Hosts ◽  
Processing Techniques ◽  
Oxide Perovskite ◽  
Laser Heated

AbstractThe research focused upon generating new substrate materials for the deposition of superconducting yttrium barium cuprate (YBCO) has yielded several new hosts in complex perovskites, modified perovskites, and other structure families. New substrate candidates such as Sr(Al1/2Ta1/2)O3 and Sr(Al1/2Nb1/2)O3, Ba(Mg1/3Ta2/3)O3 in complex oxide perovskite structure family and their solid solutions with ternary perovskite LaAlO3 and NdGaO3 are reported. Conventional ceramic processing techniques were used to fabricate dense ceramic samples. A laser heated molten zone growth system was utilized for the test-growth of these candidate materials in single crystal fiber form to determine crystallographic structure, melting point, thermal, and dielectric properties as well as to make positive identification of twin free systems. Some of those candidate materials present an excellent combination of properties suitable for microwave HTSC substrate applications.

Epitaxial Growth of CuAu–Ordered CuInSe2 Structural Polytypes by Migration Enhanced Epitaxy

1999 ◽  
Vol 583 ◽  
Author(s):  
B. J. Stanbery ◽  
C.-H. Chang ◽  
S. Kim ◽  
S. Kincal ◽  
G. Lippold ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Film Growth ◽  
Epitaxial Films ◽  
Scattering Data ◽  
Chalcopyrite Structure ◽  
Crystallographic Structure ◽  
System Parameters ◽  
Migration Enhanced Epitaxy ◽  
Growth System ◽  
Copper Excess

AbstractMigration-Enhanced Epitaxy (MEE) has been successfully employed to grow epitaxial films of the ternary compound CuInSe2 on (001) GaAs that are ordered in a CuAu crystallographic structure rather than the compound's equilibrium chalcopyrite structure. Evidence for this structural polytype is provided by XRD, TEM–TED, and Raman scattering data. Film growth under the conditions employed for this study occurs in a Stranski-Krastanov mode. The effects of growth system parameters and overall stoichiometry on 3–D island formation are described, including our observation that ordering of those islands into quasiperiodic self-assembled arrays occurs only in the case of nonstoichiometric copper excess.

Fabrication of PPLT Crystal Fiber by the Method of Laser Heated Pedestal Growth

2007 ◽  
Author(s):  
Ta-Min Tai ◽  
Shan-Chuang Pei ◽  
Li-Min Lee ◽  
Sheng-Lung Huang ◽  
A. H. Kung
Keyword(s):  
Crystal Fiber ◽  
Laser Heated

Laser-heated pedestal growth of colorless single crystal fiber

2005 ◽  
Vol 275 (1-2) ◽  
pp. e757-e761 ◽  
Author(s):  
M.R.B. Andreeta ◽  
E.R.M. Andreeta ◽  
A.C. Hernandes
Keyword(s):  
Single Crystal ◽  
Crystal Fiber ◽  
Laser Heated

Ba(Mg1/3Ta2/3)O3single crystal fiber grown by the laser heated pedestal growth technique

1994 ◽  
Vol 75 (9) ◽  
pp. 4704-4708 ◽  
Author(s):  
Ruyan Guo ◽  
A. S. Bhalla ◽  
L. E. Cross
Keyword(s):  
Growth Technique ◽  
Crystal Fiber ◽  
Laser Heated

Catalytic Activity of Complex-Oxide Perovskite-containing Compositions in Reactions of Oxidation of CO and Organic Compounds

2003 ◽  
Vol 76 (8) ◽  
pp. 1253-1259 ◽  
Author(s):  
A. A. Ostroushko ◽  
E. Shubert ◽  
A. M. Makarov ◽  
V. I. Minyaev ◽  
A. E. Udilov ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Organic Compounds ◽  
Complex Oxide ◽  
Oxidation Of Co ◽  
Oxide Perovskite

Raman Studies on Potential substrate Materials of Sr(Al1/2Ta1/2)O3 and Sr(Al1/2Nb1/2)O3 For Htsc

1995 ◽  
Vol 397 ◽  
Author(s):  
Ruiwu Tao ◽  
A.R. Guo ◽  
C.-S. Tu ◽  
I. Siny ◽  
R.S. Katiyar ◽  
...  
Keyword(s):  
Niobium Oxide ◽  
Tantalum Oxide ◽  
Complex Oxide ◽  
Growth Technique ◽  
Disorder Effects ◽  
Ceramic Samples ◽  
Microwave Applications ◽  
Laser Heated ◽  
First Time ◽  
Potential Substrate

ABSTRACTComplex oxide perovskites, namely strontium aluminum tantalum oxide (SAT) and strontium aluminum niobium oxide (SAN) were recently investigated to be potential substrate materials for HTSC films in microwave applications. Single crystals were prepared by laser heated pedestal growth technique (LHPG). We report Raman vibrational spectrum studies on them for the first time. Order-disorder effects of (Al, Ta) and (Al, Nb) sites were studied with particular interests by comparing Raman spectra of single-crystal samples with ceramic samples. Influences of B sites (Ta and Nb) on O-O modes are discussed in relation to their dielectric properties.

Growth of lithium triborate (LBO) single crystal fiber by the laser-heated pedestal growth method

1991 ◽  
Vol 112 (1) ◽  
pp. 283-286 ◽  
Author(s):  
Ji Yangyang ◽  
Zhao Shuqing ◽  
Huo Yujing ◽  
Zhang Hongwu ◽  
Li Ming ◽  
...  
Keyword(s):  
Single Crystal ◽  
Lithium Triborate ◽  
Crystal Fiber ◽  
Growth Method ◽  
Laser Heated

scholarly journals Highly Sensitive Sensors Based on Photonic Crystal Fiber Modal Interferometers

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
Joel Villatoro ◽  
Vittoria Finazzi ◽  
Gonçal Badenes ◽  
Valerio Pruneri
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Thermal Sensitivity ◽  
Post Processing ◽  
Crystal Fiber ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Processing Techniques ◽  
Highly Sensitive Sensors

We review the research on photonic crystal fiber modal interferometers with emphasis placed on the characteristics that make them attractive for different sensing applications. The fabrication of such interferometers is carried out with different post-processing techniques such as grating inscription, tapering or cleaving, and splicing. In general photonic crystal fiber interferometers exhibit low thermal sensitivity while their applications range from sensing strain or temperature to refractive index and volatile organic compounds.

Sign in / Sign up

Export Citation Format

Share Document