Now showing items 4041-4050 of 4078
Epitaxial strain, metastable structure, and magnetic anisotropy in Co‐based superlattices (invited)
(The American Institute of Physics, 1991-11-15)
We explore the relationship between interface structure and magnetic anisotropy in three types of Co‐based superlattices: Cohcp‐Au; Cofcc‐Cu; and Cohcp‐Cr, grown epitaxially on GaAs(110). For very thin layers of Co, Co‐Au, ...
On the maintenance of the axisymmetric part of the flow in the atmosphere
(Birkhäuser-Verlag; Springer Science+Business Media, 1972-12)
The maintenance of the axisymmetric component of the flow in the atmosphere is investigated by means of a steady-state, quasi-geostrophic formulation of the meteorological equations. It is shown that the meridional variations ...
TEV gamma ray emission from the active galactic nucleus Markarian 421
(The American Institute of Physics, 1994-06-20)
TeV energy gamma ray emission from the blazar Markarian 421 was detected with the Whipple 10 meter imaging Cherenkov telescope initially during the observation period March‐June 1992 at an average photon flux of 1.5×10−11 ...
Fe3O4 Verwey transition. Calorimetric determination of the effects of concentration of Zn and Cd dopants
(The American Institute of Physics, 1975-04)
To determine the effect of increase of the lattice constant and decrease in electron concentration on the Verwey transition in Fe3O4, heat capacity measurements have been made on Zn− and Cd−doped Fe3O4 from 5 to 350 K. ...
A posteriori image-correcting "deconvolution" by holographic fourier-transform division
(Elsevier, 1967-07-31)
Division of spatial field distributions in the Fourier-transform domain for "resolution-retrieving", "corrective" image deconvolution of the "smearing" resulting from extended "instrument functions" in optical imaging, ...
Electron and hole impact ionization coefficients in GaAs/Al0.45Ga0.55As/Al0.3Ga0.7As coupled well systems
(The American Institute of Physics, 1991-06-17)
We have measured electron and hole multiplication factors and impact ionization coefficients in 550 Å GaAs/500 Å Al0.3Ga0.7As quantum wells with an intermediate Al0.45Ga0.55As barrier (50 and 100 Å) inserted in the well ...
Acoustic emission from plastic deformation of a pure single crystal
(The American Institute of Physics, 1992-09-01)
Acoustic emission (AE) during plastic deformation is analyzed for a pure single crystal neglecting the effects of grain boundaries, impurities, and second‐phase particles. Acceleration of a moving dislocation is considered ...
Molecular beam epitaxial GaAs optical detectors on silica fibers
(The American Institute of Physics, 1988-05-23)
By using molecular beam epitaxy and post‐growth annealing techniques, we have successfully made GaAs interdigitated photoconductive detectors on D‐shaped silica fibers. The detectors exhibit low leakage current and internal ...
Thermodynamics of Nonstoichiometric Nickel Tellurides. I. Heat Capacity and Thermodynamic Functions of the δ Phase from 5 to 350°K
(The American Institute of Physics, 1958-03)
Heat capacities of the nickel tellurides were measured at compositions NiTe1.1 and NiTe2.0 (near limits of homogeneity of the δ phase) and at one intermediate composition, NiTe1.5, from 5 to 350°K. Heat capacity values and ...
Neutrino astrophysics with IMB: past, present, and future
(Elsevier, 1988-03)
A burst of eight neutrino interactions occurring over a six second interval had been observed with the IMB detector. The closeness in time of the burst to the optical discovery of Supernova 1987a suggests that the neutrinos ...