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Search Publications by: Susan Schima (Fed)

Displaying 26 - 37 of 37

Zigzag-shaped magnetic sensors

December 13, 2004

Author(s)

Fabio C. da Silva, Willard C. Uhlig, Anthony B. Kos, Susan A. Schima, Joe Aumentado, John Unguris, David P. Pappas

Magnetism in zigzag-shaped thin-film elements is investigated using scanning electron microscopy with polarization analysis, magnetotransport measurements, and micromagnetic simulations. We find that the angle of magnetization alternates along the length

A Superconducting Microwave Power Limiter for High-Performance Receiver Protection

June 11, 2004

Author(s)

James Booth, Kenneth Leong, Susan A. Schima

We report on the development of a microwave power limiter based on high-temperature superconductor technology. The power limiter takes the form of a 50 ohm coplanar waveguide transmission line that can be reversibly driven from the low-loss superconducting

Design and Characterization of a Superconducting Nonlinear Reference Device

December 5, 2003

Author(s)

James Booth, Kenneth Leong, Susan A. Schima, Jeffrey Jargon, Donald C. DeGroot

Abstract ' We describe the design, fabrication, and testing of a nonlinear reference device that has a calculable phase relationship between the fundamental signal and higher harmonic signals in the microwave range. Such a device would be useful for

A Superconducting Microwave Power Limiter for Protection of High-Performance Superconducting Electronics

July 11, 2003

Author(s)

James Booth, Kenneth Leong, Susan A. Schima

We report on the development of a microwave power limiter based on high temperature superconductor technology. The power limiter takes the form of a 50 Ω coplanar waveguide transmission line that can be reversibly driven into the normal state as microwave

Kinetic Inductance Contributions to the Nonlinear Response of Superconductors at Microwave Frequencies

July 11, 2003

Author(s)

James Booth, Kenneth Leong, Susan A. Schima

We demonstrate how nonlinear effects in high temperature superconducting thin films can be quantified based on a current-dependent penetration depth λ(J). Using an assumed form for λ(J), we calculate the expected third-order harmonic signals generated by

Description of the Nonlinear Behavior of Superconductors Using a Complex Conductivity

June 1, 2003

Author(s)

James Booth, Susan A. Schima, Donald C. DeGroot

The origin of the detrimental nonlinear response in the high Tc superconductor (HTS) microwave devices is currently not well understood. In order to help elucidate the origin of these nonlinear effects, we have performed phase-sensitive measurements of the