|Author||Huebener, R. P. ♦ Seifert, H.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ SUPERCONDUCTING JUNCTIONS ♦ SCANNING ELECTRON MICROSCOPY ♦ TEMPERATURE EFFECTS ♦ ELECTRIC BRIDGES ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRIC POTENTIAL ♦ ELECTRON BEAMS ♦ EXPERIMENTAL DATA ♦ FILMS ♦ IMAGES ♦ JOULE HEATING ♦ MODULATION ♦ SPECIFIC HEAT ♦ THERMAL CONDUCTIVITY ♦ TIN ♦ BEAMS ♦ DATA ♦ ELECTRIC HEATING ♦ ELECTRICAL EQUIPMENT ♦ ELECTRICAL PROPERTIES ♦ ELECTRON MICROSCOPY ♦ ELEMENTS ♦ EQUIPMENT ♦ HEATING ♦ INFORMATION ♦ JUNCTIONS ♦ LEPTON BEAMS ♦ METALS ♦ MICROSCOPY ♦ NUMERICAL DATA ♦ PARTICLE BEAMS ♦ PHYSICAL PROPERTIES ♦ PLASMA HEATING ♦ RESISTANCE HEATING ♦ THERMODYNAMIC PROPERTIES ♦ Engineering- Cryogenic Equipment & Devices ♦ Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)|
|Abstract||Temperature structures generated in a thin-film superconducting bridge through dissipation of Joule energy can be imaged by low-temperature scanning electron microscopy (LTSEM). Two voltage peaks are obtained at the boundaries of the hotspot, where the temperature profile passes through the critical temperature T/sub c/ of the bridge. If the electron beam is modulated at high frequencies the width of the modulated voltage peaks is about twice the dynamic thermal healing length and decreases with increasing modulation frequency. In this way, the spatial resolution of LTSEM can be increased considerably. Experiments performed with an O/sub 2/-doped Sn bridge up to beam modulation frequencies of 10 MHz confirm these effects. They are in good agreement with all predictions from a theoretical analysis in which the electron beam irradiation is treated as a small thermal perturbation of the sample.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||J. Low Temp. Phys.|
|Organization||Physikalisches Institut II, Universitaet Tuebingen, Tuebingen, West Germany|
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