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

5 Feb 1990

Volume 56, Issue 6, pp. 503-595

Page 2 of 2 Pages Previous Page | Jump to Page

Effects of beam parameters on excimer laser deposition of YBa2Cu3O7−δ

R. E. Muenchausen, K. M. Hubbard, S. Foltyn, R. C. Estler, N. S. Nogar, and C. Jenkins

Appl. Phys. Lett. 56, 578 (1990); http://dx.doi.org/10.1063/1.103303 (3 pages) | Cited 86 times

Full Text: | Download PDF

Show Abstract
Broad angular distributions have been observed for XeCl laser ablation plumes used in the deposition of YBa2Cu3O7−δ thin films. Distributions (inferred from film thickness) and film stoichiometry were measured as a function of laser fluence, beam shape, and oxygen pressure. Parallel to the long axis of the laser spot, plumes exhibited a cos3.5(θ) spread and composition varied with angle; in the perpendicular direction, more diffuse [cos1.5(θ)] plume distributions were associated with stoichiometric deposition. The observed phenomena are consistent with formation of a Knudsen layer near the target surface.
Show PACS
74.78.-w Superconducting films and low-dimensional structures
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
81.15.-z Methods of deposition of films and coatings; film growth and epitaxy

Thin films of the Bi2Sr2Ca2Cu3Ox superconductor

Yu Mei, H. L. Luo, and Roger Hu

Appl. Phys. Lett. 56, 581 (1990); http://dx.doi.org/10.1063/1.103304 (3 pages) | Cited 6 times

Full Text: | Download PDF

Show Abstract
Using rf sputtering technique, thin films of near single phase Bi2Sr2Ca2Cu3Ox were successfully prepared on SrTiO3(100), MgO(100), and LaAlO3(012) substrates. Zero resistance of these films occurred in the range of 90–105 K.
Show PACS
74.78.-w Superconducting films and low-dimensional structures
74.70.-b Superconducting materials other than cuprates
81.15.Cd Deposition by sputtering
74.25.-q Properties of superconductors

Crystallization of amorphous Bi cuprate fibers to superconducting Bi2Sr2Ca1Cu2O8

T. A. Miller, S. C. Sanders, J. E. Ostenson, D. K. Finnemore, S. E. LeBeau, and J. Righi

Appl. Phys. Lett. 56, 584 (1990); http://dx.doi.org/10.1063/1.103305 (3 pages) | Cited 7 times

Full Text: | Download PDF

Show Abstract
The conversion of long slender filaments of Bi‐based high‐temperature superconductors from the amorphous to the crystalline phase has been studied in order to determine the suitability of these fibers for use in a multifilamentary magnet conductor. For very fine filaments, coarsening may be a problem, so special emphasis was placed on the optimum values of time and temperature used for recrystallization. Amorphous fibers approximately 1 μm in diameter can be crystallized to form granular filaments about 0.2 μm thick (in the c direction) and 3 to 4 μm wide. The c axis generally grows perpendicular to the long axis of the fiber.
Show PACS
74.70.-b Superconducting materials other than cuprates
74.25.Ha Magnetic properties including vortex structures and related phenomena

Sm‐Fe‐Ti magnets with room‐temperature coercivities above 50 kOe

K. Schnitzke, L. Schultz, J. Wecker, and M. Katter

Appl. Phys. Lett. 56, 587 (1990); http://dx.doi.org/10.1063/1.103306 (3 pages) | Cited 29 times

Full Text: | Download PDF

Show Abstract
Using mechanical alloying and an additional annealing, we prepared bulk material of a new Sm20 Fe70 Ti10 phase observed before only in sputtered films deposited in the amorphous state and then crystallized. Crystallization of rapidly quenched and partially amorphous ribbons leads to a two‐phase material with a considerable amount of this phase but with the Fe2 Sm phase as a majority phase. This new phase (named 20:70:10 phase) has a Curie temperature of 380 °C and an estimated saturation magnetization of 6–7 kG. The magnetically isotropic, mechanically alloyed samples show room‐temperature coercivities of up to 50.3 kOe.
Show PACS
75.50.Vv High coercivity materials
81.20.Ev Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
81.40.Rs Electrical and magnetic properties related to treatment conditions

Ferrofluid‐enhanced orientation of large anisometric colloids

Min‐Hua Lu and Charles Rosenblatt

Appl. Phys. Lett. 56, 590 (1990); http://dx.doi.org/10.1063/1.102749 (3 pages) | Cited 3 times

Full Text: | Download PDF

Show Abstract
Aqueous suspensions of elongated, hollow tubules are shown to align in magnetic fields of order 10 G when mixed with a water‐based ferrofluid. The tubule’s effective susceptibility anisotropy is obtained, and is found to be six orders of magnitude larger than in the absence of the ferrofluid. A geometry‐based model is used to explain this effect.
Show PACS
75.50.Mm Magnetic liquids
82.70.Dd Colloids

Is there a radar clutter attractor?

Henry Leung and Simon Haykin

Appl. Phys. Lett. 56, 593 (1990); http://dx.doi.org/10.1063/1.102750 (3 pages) | Cited 18 times

Full Text: | Download PDF

Show Abstract
Using experimental sea clutter data obtained with an instrument‐quality radar research system, we show the existence of a chaotic attractor in the clutter. This new and exciting result is in sharp contrast with the conventional stochastic modeling of clutter as some kind of a random process with certain distribution.
Show PACS
05.45.-a Nonlinear dynamics and chaos
02.50.Ey Stochastic processes
94.80.+g Instrumentation for space plasma physics, ionosphere, and magnetosphere
Page 2 of 2 Pages Previous Page | Jump to Page
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close