Dielectric response of polycrystalline Sr1−1.5xBixTiO3 thin films under direct current bias

2010 ◽  
Vol 97 (6) ◽  
pp. 062912 ◽  
Author(s):  
Olena Okhay ◽  
Aiying Wu ◽  
Paula M. Vilarinho ◽  
Alexander Tkach
Keyword(s):  
Thin Films ◽  
Direct Current ◽  
Dielectric Response ◽  
Direct Current Bias

Dielectric loss and defect mode of SrTiO3 thin films under direct-current bias

2001 ◽  
Vol 78 (18) ◽  
pp. 2754-2756 ◽  
Author(s):  
Chen Ang ◽  
L. E. Cross ◽  
Zhi Yu ◽  
Ruyan Guo ◽  
A. S. Bhalla ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Loss ◽  
Direct Current ◽  
Defect Mode ◽  
Direct Current Bias

Effect of polarization switching cycles on the dielectric response and Rayleigh constant in Pb0.4Sr0.6TiO3 thin films

2014 ◽  
Vol 115 (6) ◽  
pp. 064102 ◽  
Author(s):  
Kui Li ◽  
Xianlin Dong ◽  
Denis Rémiens ◽  
Tao Li ◽  
Ying Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Response ◽  
Polarization Switching

Fibrous structures on diamond and carbon surfaces formed by hydrogen plasma under direct-current bias and field electron-emission properties

2003 ◽  
Vol 18 (2) ◽  
pp. 305-326 ◽  
Author(s):  
Koji Kobashi ◽  
Takeshi Tachibana ◽  
Yoshihiro Yokota ◽  
Nobuyuki Kawakami ◽  
Kazushi Hayashi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Field Emission ◽  
Direct Current ◽  
Electron Emission ◽  
Microwave Plasma ◽  
Hydrogen Plasma ◽  
Polycrystalline Diamond ◽  
Metal Catalyst ◽  
Direct Current Bias ◽  
Conical Structures

Polycrystalline diamond films, single crystal bulk diamonds, and diamond powder were treated in microwave plasma of hydrogen at 1.6 torr under a negative direct-current bias of −150 to −300 V without metal catalyst. It was found that fibrous structures, uniformly elongated along the direction normal to the specimen surface, were formed on the diamond surfaces. Similar experiments for glasslike carbon resulted in conical structures with frizzy fibers at the tops. Transmission electron microscopy measurements indicated that the fibers formed on diamond consisted of randomly oriented diamond nanocrystals with diameters of less than 10 nm, while the conical structures formed on glasslike carbon consisted of graphite nanocrystals. Field emission measurements of the fibrous specimens exhibited better emission efficiency than untreated ones. The field emission electron microscopy of the fibrous glasslike carbon showed a presence of discrete electron emission sites at a density of approximately 10,000 sites/cm2.

Dielectric response of epitaxially strained CoFe2O4spinel thin films

2012 ◽  
Vol 86 (12) ◽  
Author(s):  
Diego Gutiérrez ◽  
Michael Foerster ◽  
Ignasi Fina ◽  
Josep Fontcuberta ◽  
Daniel Fritsch ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Response

Multilayer graphene frequency doubler using direct-current bias and reflector networks

2021 ◽  
Vol 54 (17) ◽  
pp. 175103
Author(s):  
Ying Hou ◽  
Manlai Ding ◽  
Yong Fang ◽  
Xueshi Hou ◽  
Xiaoling Zhong ◽  
...  
Keyword(s):  
Direct Current ◽  
Multilayer Graphene ◽  
Frequency Doubler ◽  
Direct Current Bias

A Frequency Reconfigurable Antenna based on Few Layer Graphene

2021 ◽  
Vol 36 (5) ◽  
pp. 542-547
Author(s):  
Sheng-lan Wang ◽  
Jing-Song Hong ◽  
Yan Deng ◽  
Zhi-jian Chen
Keyword(s):  
Experimental Evidence ◽  
Bias Voltage ◽  
Direct Current ◽  
Surface Impedance ◽  
Microstrip Line ◽  
Reconfigurable Antenna ◽  
Layer Graphene ◽  
Direct Current Bias ◽  
Few Layer Graphene ◽  
Frequency Reconfigurable Antenna

In this paper, a frequency reconfigurable antenna was presented. This antenna is made up of a square loop and a microstrip line with a gap, in which the few layer graphene (FLG) sheet is located to achieve frequency reconfigurable. FLG is likes a lumped resistor with resistance. And the surface impedance can be adjusted by applying a direct current bias voltage, which obtains two work modes that imitate switch. Additionally, the experimental evidence show the proposed frequency reconfigurable antenna can provide a tunable bandwidth.

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