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For application in un‐thermostated delay lines a delay medium possessing a low acoustic loss, a zero temperature coefficient of delay and a zero or low aging rate is required. Present isopaustic glasses meet these requirements satisfactorily with the exception of aging which is found to be...
A self‐magnetic field effect is shown to be responsible for much of the low‐voltage structure and for asymmetries observed in the I‐V curves of superconducting niobium‐solder junctions (Slugs). Similar effects are to be expected in other multiply‐connected junctions.
Shock‐wave measurements at initial temperatures from 20° to 450°C reveal shock‐wave propagation in (β+α) brass is appreciably affected by alloy preheating. The shock‐velocity value measured in the alloy at 20°C is decreased ∼20% at 450°C for equal incident pressures. The anomaly is...
Mössbauer techniques have been employed to identify crystal formation in the glass system Na 2 O⋅B 2 O 3 ⋅Fe 2 O 3 containing up to 35 wt% Fe 2 O 3 . Glasses in this system exhibit a broadened, quadrupole split doublet with a peak separation of 1.0 mm∕sec, a full width at half‐maximum of...
Superconducting properties of the ternary system Ti☒Nb☒Ta were measured. Critical temperatures were found to decrease with increasing amount of Ta in the alloys from those of Ti☒Nb binary alloys. However, a broad plateau of high critical fields (above 120 kG) was observed in the region...
Different models for the growth kinetics of plate‐like precipitates have been critically reviewed. It is shown that the Zener‐Hillert equation does not properly take into consideration the capillarity effect at the advancing interphase boundary. A mathematical treatment of the diffusion...
Structure consisting of pairs of negative‐going spikes in differential conductance vs bias voltage are reported for GaAs p‐n junctions and for superconducting point contacts against a variety of conductors, including semiconductors. The spike pairs are symmetrically positioned about zero bias...
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