High frequency properties of Ni75Fe25–SiO2 granular thin films with very high resistivity

2007 ◽  
Vol 61 (3) ◽  
pp. 908-911
Author(s):  
Yang Xiaolin ◽  
Ruan Chengli
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
High Resistivity ◽  
Frequency Properties ◽  
Very High

scholarly journals Measurement of Electrical Properties of Superconducting YBCO Thin Films in the VHF Range

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3360
Author(s):  
Yakir Dahan ◽  
Eldad Holdengreber ◽  
Elichai Glassner ◽  
Oz Sorkin ◽  
Shmuel E. Schacham ◽  
...  
Keyword(s):  
Thin Films ◽  
Theoretical Model ◽  
Quality Factor ◽  
High Frequency ◽  
Unit Length ◽  
Superconducting Thin Films ◽  
Electrical Parameters ◽  
Very High Frequency ◽  
Production Constraints ◽  
Very High

A new measurement technique of electrical parameters of superconducting thin films at the Very High Frequency (VHF) range is described, based on resonators with microstrip (MS) structures. The design of an optimal resonator was achieved, based on a thorough theoretical analysis, which is required for derivation of the exact configuration of the MS. A theoretical model is presented, from which an expression for the attenuation of a MS line can be derived. Accordingly, simulations were performed, and an optimal resonator for the VHF range was designed and implemented. Production constraints of YBa2Cu3O7 (YBCO) limited the diameter of the sapphire substrate to 3″. Therefore, a meander configuration was formed to fit the long λ/4 MS line on the wafer. By measuring the complex input reflection coefficients of a λ/4 resonator, we extracted the quality factor, which is mainly affected by the dielectric and conductor attenuations. The experimental results are well fitted by the theoretical model. The dielectric attenuation was calculated using the quasi-static analysis of the MS line. An identical copper resonator was produced and measured to compare the properties of the YBCO resonator in reference to the copper one. A quality factor of ~6·105 was calculated for the YBCO resonator, three orders of magnitude larger than that of the copper resonator. The attenuation per unit length of the YBCO layer was smaller by more than five orders of magnitude than that of the copper.

Deposition of Thin Films of Silicon Carbide on Fused Quartz and on Sapphire by Laser Ablation of Ceramic Silicon Carbide Targets

1992 ◽  
Vol 285 ◽  
Author(s):  
L. Rimai ◽  
R. Ager ◽  
J. Hangas ◽  
E. M. Loaothetis ◽  
Nayef Abu-ageel ◽  
...  
Keyword(s):  
Thin Films ◽  
Silicon Carbide ◽  
Room Temperature ◽  
Optical Band Gap ◽  
Energy Gap ◽  
Fused Silica ◽  
High Resistivity ◽  
Fused Quartz ◽  
Amorphous Sic ◽  
Very High

ABSTRACTAblation of ceramic silicon carbide with 351 nm excimer radiation was used to depositSIC films on fused silica and on sapphire. For deposition temperatures above 850° C, diffraction shows the films to be crystalline with the [111] axis preferentially oriented normally to the film. Optical spectra show an indirect energy gap at 2.2 eV, near that for the cubic polytype, although the 200 diffractions are absent. Room temperature resistivities range between .02 to .1 Ωcm. Deposition below 600° C yields amorphous SiC with no diffraction bands, low and variable optical band gap and very high resistivity.

Effect of post-annealing on ultra-high frequency properties of amorphous Fe-Co-B thin films

2000 ◽  
Vol 36 (5) ◽  
pp. 3418-3420 ◽  
Author(s):  
L.H. Chen ◽  
Y.H. Shih ◽  
K.A. Ellis ◽  
S. Jin ◽  
R.B. van Dover ◽  
...  
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Ultra High Frequency ◽  
Post Annealing ◽  
Frequency Properties

Low power density multihole cathode very-high-frequency plasma for mixed phase Si:H thin films

2008 ◽  
Vol 93 (19) ◽  
pp. 191502 ◽  
Author(s):  
C. Jariwala ◽  
A. Chainani ◽  
R. Eguchi ◽  
M. Matsunami ◽  
S. Shin ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Power ◽  
Power Density ◽  
High Frequency ◽  
Mixed Phase ◽  
Very High Frequency ◽  
High Frequency Plasma ◽  
Frequency Plasma ◽  
Very High

High frequency properties of patterned Fe-Al-O thin films

2004 ◽  
Vol 201 (8) ◽  
pp. 1842-1845 ◽  
Author(s):  
Bum Chan Park ◽  
N. D. Ha ◽  
T. S. Yoon ◽  
B. K. Min ◽  
C. G. Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Frequency Properties

High‐frequency properties of superconducting Y‐Ba‐Cu‐oxide thin films

1992 ◽  
Vol 71 (1) ◽  
pp. 344-346 ◽  
Author(s):  
E. S. Ramakrishnan ◽  
Ming‐Yih Su ◽  
Wei‐Yean Howng
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Oxide Thin Films ◽  
Frequency Properties
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