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Xe ion irradiation of NiSi, PdSi, and PtSi on Si was performed at various substrate temperatures. The phase formation and mixing behavior of the three monosilicides with their Si substrates are quite different. For NiSi, NiSi 2 was formed on amorphous Si substrates at 350 °C, while NiSi remained...
Plasma emission actinometry has been used to study the mechanism by which small additions of oxygen (∼0.5%) enhance the rate of diamond deposition in a dilute (4%) CH 4 /H 2 discharge at high temperature (900–1300 K). Increasing amounts of CH 4 in the feed depress H, while increasing the O 2...
The effects of Ar‐ion sputtering on electrical properties of Au contacts on (100) GaAs and the role of doping concentration have been studied. The n ‐GaAs was doped with 10 17 or 10 18 cm −3 Si or with 10 18 cm −3 Te and the p ‐GaAs with 10 18 or 10 19 cm −3 Zn. After either chemical...
A copolymer of vinylidene fluoride and tetrafluoroethylene is solution cast on a p ‐type silicon wafer. A strong inversion is produced at the silicon surface when the copolymer film is corona charged or when a subsequently evaporated aluminum gate is biased. Although the dipole alignment in the...
An experimental system for measuring ion‐beam‐induced deposition yield is described. Gold films were deposited on quartz‐crystal microbalances (QCM) by decomposing dimethyl gold hexafluoroacetylacetonate molecules (C 7 H 7 F 6 O 2 Au) with a 5‐keV argon‐ion beam. The QCMs provide an i n...
The effective number of carriers N eff of a sample with ring geometry is recalculated analytically and numerically. The N eff of the sample with ring geometry as calculated by Bisschop (Ph.D. thesis, Eindhoven University of Technology, Eindhoven, 1983, Chap. V) is erroneous. Therefore, the 1/ f...
The tank circuit noise in an rf‐biased R‐SQUID noise thermometer is shown to have a small but a detectable influence on the dc impedance of the resistively shunted Josephson junction. The result supplements earlier calculations which have been used to explain some of the experimentally...
We have measured intragrain critical currents in field‐oriented samples of a rare‐earth‐free high‐ T c superconductor (Tl 0.75 Bi 0.25 ) 1.33 Sr 1.33 Ca 1.33 Cu 2 O 6.67+δ , the ‘‘1212’’ phase. The critical current J c is anisotropic. For fields oriented along the conducting...
We have measured the effect of the mass and pole strength of a magnet on its equilibrium levitation height z over a superconducting disk of YBa 2 Cu 3 O 7 . A simple image force model gives the observed dependence of z on the mass and pole strength, but not the observed proportionality factor.
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