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15 Feb 1975

Volume 26, Issue 4, pp. 137-212

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Nonchemical HF pulse laser pumped by e−beam−sustained discharge

R. M. Osgood Jr. and D. L. Mooney

Appl. Phys. Lett. 26, 201 (1975); http://dx.doi.org/10.1063/1.88115 (4 pages) | Cited 1 time

Online Publication Date: 2 September 2008

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Experiments with a pulsed discharge−pumped (nonchemical) HF laser are described. The laser discharge is sustained with a cold cathode electron beam gun. An output power of 8 kW/cm2 in a 2.5−μsec pulse length is obtained. Several observations regarding the laser mechanism are made.
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42.55.Lt Gas lasers including excimer and metal-vapor lasers

Superconducting weak links formed by ion implantation

C. H. Arrington III and B. S. Deaver

Appl. Phys. Lett. 26, 204 (1975); http://dx.doi.org/10.1063/1.88116 (3 pages) | Cited 11 times

Online Publication Date: 2 September 2008

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The superconducting order parameter has been controllably reduced in a narrow band across a strip of Nb thin film by implanting iron ions into the film. The resulting weak link exhibits the Josephson effects and is exceptionally rugged, both physically and electrically.
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74.78.-w Superconducting films and low-dimensional structures
61.72.U- Doping and impurity implantation
85.25.-j Superconducting devices

Dynamic conversion of magnetic bubble domain walls at megahertz frequencies in epitaxial garnet films

F. B. Hagedorn, S. L. Blank, and R. J. Peirce

Appl. Phys. Lett. 26, 206 (1975); http://dx.doi.org/10.1063/1.88117 (4 pages) | Cited 3 times

Online Publication Date: 2 September 2008

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We have measured the circuit propagation characteristics of magnetic bubble domains in 15 different epitaxial films of Y1.9Sm0.1Ca1Ge1Fe4O12, using a TX propagation circuit with 28.8−μm period. For film thicknesses of 2 μm or less, reliable propagation was observed up to 1.7 MHz. Thicker films ceased to propagate reliably at frequencies as low as 0.5 MHz. Propagation failure is attributed to dynamic conversion of the bubble domain walls, and reasonably good quantitative agreement is shown between our measured critical frequencies and the critical frequencies calculated from a recently published model for dynamic conversion.
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75.60.Ch Domain walls and domain structure

Oxygen sensors using CoO ceramics

E. M. Logothetis, K. Park, A. H. Meitzler, and K. R. Laud

Appl. Phys. Lett. 26, 209 (1975); http://dx.doi.org/10.1063/1.88118 (3 pages) | Cited 29 times

Online Publication Date: 2 September 2008

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Ceramic CoO has been found to be a material suitable for oxygen sensing. The CoO sensor has good sensitivity and fast response time and appears particularly suited for applications involving high temperatures and corrosive or contaminating environments, e.g., combustion processes.
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07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
82.33.Vx Reactions in flames, combustion, and explosions
07.20.Ka High-temperature instrumentation; pyrometers

Current noise measurements in continuous metal thin films

M. Celasco and F. Fiorillo

Appl. Phys. Lett. 26, 211 (1975); http://dx.doi.org/10.1063/1.88096 (2 pages) | Cited 6 times

Online Publication Date: 2 September 2008

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Current noise phenomena were investigated in pure Al thin films. Noise measurements were performed on very small sample volumes (less than 10−11 cm3) obtained by electromigration damaging of the film, at current densities higher than 106 A/cm2 with an apparatus whose sensitivity was of the order of 10−19 V2/Hz. Under these conditions, which probably provide the best sensitivity limit at present available, no excess noise was detected before the destruction of the sample, except for occasional instabilities corresponding to macroscopic structural changes of the film. It is concluded that a stationary current noise cannot be observed in a metal conductor within the highest sensitivities presently attainable.
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72.70.+m Noise processes and phenomena
73.61.At Metal and metallic alloys
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