Title :
Self-heating hotspot effects in HTS thin films
Author :
Peterson, T.L. ; Maartense, I. ; Biggers, R.R.
Author_Institution :
Wright Lab., Wright-Patterson AFB, OH, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The current-voltage (I-V) characteristics associated with self-heating hotspots in HTS thin films patterned into several different geometries have been investigated under both current-biased and voltage-biased conditions. The hysteretic behavior of the I-V characteristics as a function of sample temperature are in agreement with behavior predicted by resistive hotspot models for superconducting bridges. Additionally, the effect of magnetic fields on the current required to generate, as well as maintain, a normal hotspot has been investigated. Finally, the characteristics of voltage pulses resulting from a step increase in current have been examined to study the propagation of hot spots in HTS films.<>
Keywords :
high-temperature superconductors; superconducting thin films; HTS thin films; current-biasing; current-voltage characteristics; hysteresis; magnetic fields; resistive models; self-heating hotspots; superconducting bridges; voltage pulses; voltage-biasing; Bridge circuits; Geometry; High temperature superconductors; Magnetic films; Magnetic hysteresis; Predictive models; Superconducting films; Superconducting thin films; Transistors; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
