APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

15 Oct 1981

Volume 39, Issue 8, pp. 581-672

Page 2 of 2 Pages Previous Page | Jump to Page

Grain growth of polycrystalline silicon films on SiO2 by cw scanning electron beam annealing

Kenji Shibata, Tomoyasu Inoue, Tadahiro Takigawa, and Shintaro Yoshii

Appl. Phys. Lett. 39, 645 (1981); http://dx.doi.org/10.1063/1.92839 (3 pages) | Cited 10 times

Full Text: | Download PDF

Show Abstract
Reduced pressure, chemical vapor deposited polycrystalline silicon films (5000 Å thick) over thermally grown SiO2 on (100) silicon wafers are recrystallized by a scanning electron microscope modified electron beam annealing system. On the basis of transmission electron microscope bright‐field images and electron diffraction patterns, large grained polycrystalline silicon films of 20‐μm average grain size are obtained after electron beam annealing. Electron beam current, scanning rate, and annealing repetition are found to be important parameters in the recrystallization. Optimum values for them are from 1.6 to 1.9 mA, from 40 to 80 cm/sec, and from 5 to 10 times, respectively.
Show PACS
68.55.-a Thin film structure and morphology
81.40.Ef Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
07.79.Cz Scanning tunneling microscopes
61.05.-a Techniques for structure determination
81.10.Fq Growth from melts; zone melting and refining

Quasiparticle‐induced coupling effects between two superconducting weak links

L. G. Neumann, Y. D. Dai, and Y. H. Kao

Appl. Phys. Lett. 39, 648 (1981); http://dx.doi.org/10.1063/1.92840 (3 pages) | Cited 16 times

Full Text: | Download PDF


See Also: Erratum

Show Abstract
Interactions between two independently biased thin‐film superconducting microbridges yield a voltage step in the current‐voltage characteristics of the bridges. Perturbation theory applied to the quasiparticle coupling currents explains these results as apparent critical current depression due to a regenerative feedback effect. Calculated changes in the critical current caused by the combined effects of order parameter depression, dc and ac quasiparticle coupling currents are in good agreement with experiments.
Show PACS
74.50.+r Tunneling phenomena; Josephson effects
85.25.-j Superconducting devices

Low‐noise self‐pumped Josephson tunnel junction amplifier

N. Calander, T. Claeson, and S. Rudner

Appl. Phys. Lett. 39, 650 (1981); http://dx.doi.org/10.1063/1.92841 (3 pages) | Cited 4 times

Full Text: | Download PDF

Show Abstract
We have studied the parametric amplification properties of an internally pumped Josephson tunnel junction, where the shunt contained resistive and inductive components. The amplification was, in this case, limited by circuit component values to less than 8 dB at 10 GHz, but it was very stable against variations in bias conditions. The amplifier gain‐bandwidth product was large and the noise level very low. We estimated the noise temperature to be less than 50 K, which should make the device attractive for mm‐wave amplification.
Show PACS
74.50.+r Tunneling phenomena; Josephson effects
85.25.-j Superconducting devices

A novel current injection Josephson logic gate with high gain

Kohji Hohkawa, Masaru Okada, and Akira Ishida

Appl. Phys. Lett. 39, 653 (1981); http://dx.doi.org/10.1063/1.92808 (3 pages) | Cited 9 times

Full Text: | Download PDF

Show Abstract
A novel Josephson logic gate achieving high gain, employing current injection, and having a noninterferometer configuration has been proposed and studied. The gate includes three small junctions for input sensing, output driving, and I‐O isolation. The junctions are appropriately biased by source resistors to obtain high current gain. Computer simulation and preliminary experiment have demonstrated that a current gain higher than 2 can easily be obtained through the proposed configuration.
Show PACS
74.50.+r Tunneling phenomena; Josephson effects
85.25.-j Superconducting devices

Large gain, negative resistance, and oscillations in superconducting quasiparticle heterodyne mixers

W. R. McGrath, P. L. Richards, A. D. Smith, H. van Kempen, R. A. Batchelor, D. E. Prober, and P. Santhanam

Appl. Phys. Lett. 39, 655 (1981); http://dx.doi.org/10.1063/1.92809 (4 pages) | Cited 23 times

Full Text: | Download PDF

Show Abstract
We have measured the properties of a superconductor‐insulator‐superconductor quasiparticle mixer which is operated in the quantum limit. Single sideband conversion gain larger than +4 dB was observed at 36 GHz with a mixer noise temperature T = 9±6 K, which is to be compared with the (Planck) quantum limit hω/(k ln 2)≃2.5 K. Complete three‐port mixer calculations are presented which are in good agreement with the gain measurements. The dynamic resistance was observed to become infinite and then negative as the source conductance was decreased. This implies that arbitrarily large gain is available. The negative resistance is accompanied by IF oscillations.
Show PACS
07.57.Kp Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors
74.50.+r Tunneling phenomena; Josephson effects

In situ formed permanent magnet Cu‐Fe multifilamentary composites

G. Dublon, F. Habbal, and J. Bevk

Appl. Phys. Lett. 39, 659 (1981); http://dx.doi.org/10.1063/1.92810 (3 pages) | Cited 5 times

Full Text: | Download PDF

Show Abstract
Cu‐30 Vol % Fe multifilamentary composites were produced in situ. Magnetic hysteresis loops of wire and tape composites were obtained at room temperature as a function of both cross‐sectional area reduction, up to 99.9996%, and annealing conditions. Hci and (BH)max increase with cross‐sectional area reduction, reaching 250 Oe and 0.46 MG Oe, respectively, in the most heavily deformed unannealed samples. On proper annealing, Hci and (BH)max increase dramatically, up to 590 Oe and 1.35 MG Oe, respectively. Considering the simple preparation technique and inexpensive constituent elements, the in situ formed Cu‐Fe composites appear to have the potential for permanent magnet applications.
Show PACS
07.55.Db Generation of magnetic fields; magnets
85.70.-w Magnetic devices
81.05.Ni Dispersion-, fiber-, and platelet-reinforced metal-based composites
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.50.Bb Fe and its alloys

Electro‐optical induction of recombination luminescence in an organic photoconductor

R. F. Code and Z. D. Popovic

Appl. Phys. Lett. 39, 662 (1981); http://dx.doi.org/10.1063/1.92811 (3 pages) | Cited 4 times

Full Text: | Download PDF

Show Abstract
Recombination luminescence has been observed in particle dispersions of an organic photoconductor (x‐H2Pc) by a new electro‐optical technique that eliminates the need for double injection electrodes. The method permits independent investigations to be made of the charge carrier photogeneration and recombination processes in a single sample of photoconducting material.
Show PACS
78.20.Jq Electro-optical effects
75.20.Ck Nonmetals

The effect of lithium on the electronic configuration of LixFeV3O8 (0⩽x⩽2)

M. Eibschütz, D. W. Murphy, S. M. Zahurak, and P. A. Christian

Appl. Phys. Lett. 39, 664 (1981); http://dx.doi.org/10.1063/1.92812 (3 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
The reduction of V ions in FeV3O8 from V5+(3d0) and V4+(3d1) to V4+(3d1) and V3+(3d2) by lithiation with n‐BuLi has been inferred by 57Fe Mössbauer effect. The Fe is localized and in the Fe3+ state for all x.
Show PACS
76.80.+y Mössbauer effect; other γ-ray spectroscopy
82.45.-h Electrochemistry and electrophoresis

Dielectric anomaly in inhomogeneous materials with application to sedimentary rocks

P. N. Sen

Appl. Phys. Lett. 39, 667 (1981); http://dx.doi.org/10.1063/1.92813 (2 pages) | Cited 20 times

Full Text: | Download PDF

Show Abstract
A small concentration of thin plate‐like insulating material in a conducting host can give rise to anomalously high values of dielectric constant. For a small concentration η of oblate spheroidal grains (a ≪ b = c) with depolarization factor along symmetry (a) axis Ls = 1−δ,δ = πa/2b, the static value of the dielectric constant of rock ϵs and dc conductivity σ(0) are given for (a) δ<η as σ(0) = δσR/η, ϵs≅ϵm/η, and for (b) δ≳η as σ(0)≅σR(1−η/δ), ϵs≅ηϵm/δ2. Case (a) corresponds to the well‐known Maxwell–Wagner effect with ϵs diverging as η→0, and σ(0)→0. Case (b) gives a novel result that ϵs may diverge for δ≳η≫δ2, with a nonvanishing σ(0). Case (b) is applied to explain frequency and salinity dependences and the large values (∼103, observed at MHz frequencies) of the dielectric constant of conducting sedimentary rocks. Possible reasons for the larger values (∼106) observed experimentally at lower (khz) frequencies are discussed.
Show PACS
77.22.Ch Permittivity (dielectric function)
66.90.+r Other topics in nonelectronic transport properties of condensed matter (restricted to new topics in section 66)
42.25.Dd Wave propagation in random media
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

Evidence for interdiffusion of hydronium and alkali ions in leached glasses

I. S. T. Tsong, C. A. Houser, W. B. White, A. L. Wintenberg, P. D. Miller, and C. D. Moak

Appl. Phys. Lett. 39, 669 (1981); http://dx.doi.org/10.1063/1.92814 (2 pages) | Cited 3 times

Full Text: | Download PDF

Show Abstract
The interdiffusion mechanism governing the leaching (or hydration) of glasses is studied using the 19F resonant nuclear reaction. By measuring the number of hydrogen ions in the surface layers of leached glasses, we have identified that a hydronium‐sodium ion exchange process is in operation in leached commercial glasses while it is less conclusive as to the exact mechanism responsible for the leaching of simple laboratory binary and ternary glasses.
Show PACS
82.80.Jp Activation analysis and other radiochemical methods
66.30.Ny Chemical interdiffusion; diffusion barriers
81.05.Kf Glasses (including metallic glasses)
FREE

Erratum: Dielectric and hydrodynamic instabilities in certain classes of discotic mesophases

J. C. Dubois, M. Hareng, S. LeBerre, and J. N. Perbet

Appl. Phys. Lett. 39, 671 (1981); http://dx.doi.org/10.1063/1.92892 (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
78.20.Jq Electro-optical effects
81.20.-n Methods of materials synthesis and materials processing
99.10.Cd Errata
FREE

Erratum: Injected‐carrier‐induced refractive‐index change in semiconductor lasers

A. Olsson and C. L. Tang

Appl. Phys. Lett. 39, 671 (1981); http://dx.doi.org/10.1063/1.92887 (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
42.55.Px Semiconductor lasers; laser diodes
78.20.Jq Electro-optical effects
99.10.Cd Errata
FREE

Erratum: A new electrical breakdown phenomenon in gas‐filled insulating bulbs

D. Friedmann, F. L. Curzon, and J. Young

Appl. Phys. Lett. 39, 671 (1981); http://dx.doi.org/10.1063/1.92888 (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
52.80.-s Electric discharges
99.10.Cd Errata
FREE

Erratum: Bistable optical switch using a yittrium‐iron‐garnet crystal with phase matching films

M. Shirasaki, N. Takagi, and T. Obokata

Appl. Phys. Lett. 39, 672 (1981); http://dx.doi.org/10.1063/1.92889 (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
42.65.-k Nonlinear optics
99.10.Cd Errata
FREE

Erratum: Scaling studies in field reversal experiments

J. Lipson, W. T. Armstrong, J. C. Cochrane, K. F. McKenna, E. G. Sherwood, M. Tuszewski, and S. Hamasaki

Appl. Phys. Lett. 39, 672 (1981); http://dx.doi.org/10.1063/1.92890 (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
52.55.Dy General theory and basic studies of plasma lifetime, particle and heat loss, energy balance, field structure, etc.
99.10.Cd Errata
Page 2 of 2 Pages Previous Page | Jump to Page
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close