scholarly journals Relationship Among Preparation, Structure and Superconductivity in Ti-Ca-Ba-Cu-O Compounds

1993 ◽  
Vol 15 (3-4) ◽  
pp. 117-138
Author(s):  
I. Kirschner ◽  
S. Leppävuori ◽  
A. Uusimäki
Keyword(s):  
Single Phase ◽  
Substantial Effect ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Term Stability ◽  
Long Term Stability ◽  
Preparation Conditions ◽  
Superconducting Parameters

Analysis of a comprehensive set of experimental results has proven the substantial effect of the precise preparation conditions upon the structure and superconducting parameters of Ti-Ca-Ba-Cu-O samples. The techniques required for the preparation of specimens of single phase and long-term stability, together with methods for improvement of the characteristic parameters have been determined. Comparing results derived from samples prepared by different methods has allowed the quantitative differences of the characteristic parameters to be evaluated.

Influence of Preparation Conditions on Long-Term Stability of Magnetoresistive Properties of Nanostructured La-Sr-Mn-Co-O Films Grown by PI MOCVD

2021 ◽  
pp. 1-1
Author(s):  
Nerija Zurauskiene ◽  
Skirmantas Kersulis ◽  
Vakaris Rudokas ◽  
Milita Vagner ◽  
Karolis Motiejuitis ◽  
...  
Keyword(s):  
Term Stability ◽  
Long Term Stability ◽  
Preparation Conditions

NANOSECOND RESPONSE POLYMER ELECTRO-OPTIC SWITCH WITH HIGH POLING EFFICIENCY AND GOOD LONG-TERM STABILITY

2013 ◽  
Vol 27 (22) ◽  
pp. 1350154 ◽  
Author(s):  
JIAN SUN ◽  
XIBIN WANG ◽  
YUANBIN YUE ◽  
JIE MENG ◽  
XIAOQIANG SUN ◽  
...  
Keyword(s):  
Optical Properties ◽  
Insertion Loss ◽  
Order Parameter ◽  
Response Speed ◽  
Characteristic Parameters ◽  
Term Stability ◽  
Long Term Stability ◽  
Electro Optic ◽  
Poling Temperature

In this paper, a Mach–Zehnder interferometer (MZI) electro-optic (EO) polymer switch with a guest–host material Disperse Red 19(DR19)/SU-8 has been designed and fabricated. The optical properties of the DR19/SU-8 were characterized in detail. By optimizing the poling temperature, the DR19/SU-8 material exhibits a high poling efficiency and a good long-term stability. The order parameter Φ is calculated as 0.65 and electro-optic coefficient γ33 is measured to be 11 pm/V. After about 1440 h, the γ33 remains stable at 7.4 pm/V. The characteristic parameters of the waveguide were carefully designed and fabrication process was strictly controlled. At 1550 nm, the insertion loss of the device is 11.2 dB. The rise time and fall time of the switch are 26.6 ns and 22.5 ns, respectively. Owing to the nanosecond response speed and good long-term stability, this switch exhibits potential for planar active lightwave circuit applications.

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