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Search Publications by: Michael H. Kelley (Assoc)

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Displaying 26 - 50 of 114

Domain Structures in Magnetoresistive Granular Metals

January 1, 1995
Author(s)
A Gavrin, Michael H. Kelley, J Xiao, C Chien, Robert Celotta
We have imaged the magnetic domain structure of several heterogeneous Co xAg 1-x alloys by using scanning electron microscopy with polarization analysis. These images show that extended domain structures exist in both the as-deposited samples and in

Uncertainty Intervals for Polarized Beam Scattering Asymmetry Statistics

July 1, 1993
Author(s)
Kevin Coakley, Jabez J. McClelland, Michael H. Kelley, Robert Celotta
In many scattering experiments, the quantity of most direct physical interest is a measure of the difference between two closely related scattering signals, each generated by a Poisson scattering process. This difference is often expressed in terms of an

Spin-Resolved Elastic Scattering of Electrons from Sodium

April 1, 1993
Author(s)
Steven R. Lorentz, R E. Scholten, Jabez J. McClelland, Michael H. Kelley, Robert Celotta
Angle-resolved ratios of the separate triplet and singlet spin channel cross sections have been measured for elastic scattering of spin-polarized electrons from optically pumped spin-polarized sodium atoms. The triplet-to-singlet ratios axe reported at

Scattering of Polarized Electrons from Optically Pumped Sodium Atoms

January 1, 1992
Author(s)
Michael H. Kelley, Jabez J. McClelland, Steven R. Lorentz, R E. Scholten, Robert Celotta
We have measured the spin-dependence for elastic and superelastic scattering of spin-polarized electrons from optically prepared sodium atoms at selected incident energies from 1.0 to 54.4 eV and for scattering angles ranging from 10-degrees to 140-degrees

Spin-Polarized Photoemission Spectroscopy of Magnetic Surfaces Using Undulator Radiation

January 1, 1992
Author(s)
Philip Johnson, S Hulbert, R Klaffky, N Brookes, Andrew Clarke, B Sinkovic, N. Smith, Robert Celotta, Michael H. Kelley, Daniel T. Pierce, M Scheinfein, B Waclawski, B.O. Wells
A beamline has been established at the National Synchrotron Light Source to perform angle-resolved photoemission experiments on magnetic surfaces with spin sensitivity. The system has two novel features: it uses a miniature electron-spin polarization

Spin-Resolved Elastic Scattering of Electrons from Sodium Below the Inelastic Threshold

December 30, 1991
Author(s)
Steven R. Lorentz, R E. Scholten, Jabez J. McClelland, Michael H. Kelley, Robert Celotta
A very stringent test of low-energy electron-atom collision theory is made in the most favorable energy regime for the close-coupling approximation. Data are presented as exchange asymmetries in angle-resolved elastic scattering of spin-polarized electrons

Spin-resolved Superelastic Scattering from Sodium at 10 and 40 eV

December 28, 1991
Author(s)
R E. Scholten, Steven R. Lorentz, Jabez J. McClelland, Michael H. Kelley, Robert Celotta
Spin-resolved superelastic electron scattering from sodium has been measured at total energies of 10 and 40 eV, for scattering angles between 10° and 140°. The angular momentum transfer, Lperp}, and the spin-resolved components L(Tperp} and L(S)perp} have

Scanning Electron Microscopy With Polarization Analysis (SEMPA)

January 1, 1990
Author(s)
M Scheinfein, John Unguris, Michael H. Kelley, Daniel T. Pierce, Robert Celotta
This was an extended abstract prepared for inclusion in the Microscopy & Microanalysis '99 Proceedings. It is a summary of Observation of Antiparallel Magnetic Order in Weakly Coupled Co/Cu Multilayers, which was published in Physical Review Letters, Vol

Spin-polarization, Orientation, and Alignment in Electron-Atom Collisions

January 1, 1990
Author(s)
Michael H. Kelley
The use of state-selection techniques has added greatly to our fundamental understanding of electron-atom collision phenomena. In particular, measurements of atomic orientation and alignment in electron impact excitation, and measurements of spin