High Temperature Superconductors in High Frequency Fields—Fundamentals and Applications

The nonlinearity of the surface impedance 2, of YBazCu307-= is of great importance for passive microwave devices. Since the 2, depends upon the microwave current and magnetic field H d , designs must consider the losses and intermodulation distortion at the operating power levels. We present a complete characterization of the nonlinearities in high-quality YBazCu307-, thin films. We have measured Z,(Hd) for Hd from 0 to approximately 1 kOe vs temperature from 4.2 K to T, and vs frequency from 1.5 to 10 GHz using a stripline resonator. The results are compared to a coupled-grain model which shows good agreement for R , ( H d ) . The imaginary part of Z,(Hd), i.e., X , ( H d ) , however, does not fit the model.

show abstract

“…The low-field surface resistance measured on these films is comparable to that of other high-quality films reported in the literature [7].…”

Section: Experimental Techniquessupporting

confidence: 84%

Nonlinear surface resistance in YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films

Oates

Nguyen

Dresselhaus

et al. 1993

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…2 for both mode 1 2 at both temperatures is nearly independent of cur and is due to the YBCO film. In this regime the resista has an f 2 dependence typical of epitaxial films [9]. Si the current distribution is peaked at the edges, when the rf input power is increased, the current density at the edges exceeds the J , of the junction, and the resistance of mode 1 quickly rises, soon exceeding that of mod which remains unaffected by the fabricated junction.…”

Section: Resultsmentioning

confidence: 97%

Power dependence of microwave Z/sub s/ in high-T/sub c/ Josephson junctions: Measurements and modeling

Habib

Oates

Dresselhaus

et al. 1997

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The nonlinear power dependence of the microwave frequency surface impedance of high-Tc superconductors remains inadequately understood, thus limiting device applications. It is believed that weak links, grain boundaries, and other material defects exhibiting Josephson junction behavior are a source of the nonlinear behavior. Using a stripline-resonator technique, we have performed microwave measurements of t h e resistive and reactive components of the impedance as a function of input power, frequency, temperature, and dc applied magnetic field. The results are compared t o a resistively shunted junction (RSJ) model that yields excellent agreement at low and intermediate values of the input current. The values of I, amid R, from d c transport measurements are compared i;o t h e rf values obtained from fitting data using t h e RSJ model. YBCO STRIPLINE RESONATOR JOSEPHSON /-MODE2

show abstract

“…YBCO shows outstanding microwave surface resistance, making it a very promising option for several high-frequency uses. YBCO-based superconducting microelectronics in high-frequency electronics have the potential for ultra-fast signal processing and communication systems with minimum energy dissipation, making them very efficient for high-speed data transmission and digital logic circuits [60]. YBCO's low microwave surface resistance in communication systems allows for the creation of high-performance components like low-noise and high-power amplifiers, essential for satellite communication and wireless networks [61].…”

Section: Ybco's Potential Advantages In High-frequency Applicationsmentioning

confidence: 99%

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Dahal,

Wang

2024

Preprint

View full text Add to dashboard Cite

The performance of Yttrium-Barium Copper Oxide (YBCO) high-temperature superconductors in high-frequency applications is significantly affected by the microwave surface resistance (Rs). The paper delves into the basics, measuring methods and factors affecting the resistance (Rs) in YBCO, highlighting its high critical temperature (Tc) and low resistance, positioning it as a promising material. YBCO's compatibility with epitaxial growth and microstructure engineering offers opportunities to reduce grain boundary effects and improve Rs, making it advantageous for high-frequency electronics, communication systems, and MRI coils. This is due to its high critical current density (Jc) and exceptional Rs at practical temperatures. Challenges remain in comprehending and managing Rs in YBCO, despite its favorable characteristics. Utilizing advanced fabrication methods and incorporating nanotechnology allow for customization of YBCO-based devices. Multi-scale modeling and simulation are essential for guiding experimental work and understanding YBCO's performance in high-frequency settings. This study highlights the promise of YBCO for future high-frequency technologies and stresses the importance of more research to overcome hurdles and fully exploit its capabilities, potentially transforming superconducting devices for practical use.

show abstract

High Temperature Superconductors in High Frequency Fields—Fundamentals and Applications

Cited by 8 publications

References 36 publications

Nonlinear surface resistance in YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films

Nonlinear surface resistance in YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films

Power dependence of microwave Z/sub s/ in high-T/sub c/ Josephson junctions: Measurements and modeling

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Contact Info

Product

Resources

About