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Search Publications by: Daniel T Pierce (Assoc)

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Displaying 101 - 125 of 156

CO Chemisorption on Ni(110): Effect on Surface Magnetism

January 1, 1986
Author(s)
C Feigerle, A Seiler, J Pena, Robert Celotta, Daniel T. Pierce
The effect of CO chemisorption on the surface magnetism and unfilled electronic structure of Ni(110) is investigated by spin-polarized inverse-photoemission spectroscopy. A saturation in the reduction of the unfilled minority-spin d density of states is

Low Energy Diffuse Scattering Electron Spin Polarization Analyzer

January 1, 1986
Author(s)
John Unguris, Daniel T. Pierce, Robert Celotta
A new, compact (approximately fist sized), efficient electron-spin analyzer is described. It is based on low-energy (150 eV) diffuse scattering from a high-Z target, for example, an evaporated polycrystalline Au film opaque to the incident electron beam

Polarized Electron Probes of Magnetic Surfaces

January 1, 1986
Author(s)
Robert Celotta, Daniel T. Pierce
The magnetic properties of surfaces are now being explored with electron spectroscopies that use electron spin polarization techniques. The increased activity in beams is spurred by new scientific and technological challenges and is made feasible by recent

Chemisorbed Oxygen on Ni(110) Studied by Spin Polarized Inverse Photoemission

January 1, 1985
Author(s)
C Feigerle, A Seiler, J Pena, Robert Celotta, Daniel T. Pierce
Dissociative chemisorption of O2 on the surface on Ni(110) has been investigated by the techniques of AES, LEED, and spin polarized inverse photoemission spectroscopy (SPIPES). SPIPES provides a unique method for studying the empty electronic states of the

Connection Between Surface Magnetism and Electronic Structure of Oxygen on Ni(110)

January 1, 1985
Author(s)
A Seiler, C Feigerle, J Pena, Robert Celotta, Daniel T. Pierce
The d-band holes which give rise to ferromagnetism in Ni can be directly observed by spin-polarized inverse photoelectron spectroscopy (SPIPES). Only incident electrons polarized in the minority spin direction can fall into unfilled minority spin states

An Intense Source of Monochromatic Electrons: Photoemission from GaAs

January 1, 1984
Author(s)
C Feigerle, Daniel T. Pierce, A Seiler, Robert Celotta
Measurements of intensity and width of the energy distribution for photoemission from negative electron affinity GaAs have been made as a function of surface preparation and temperature. Energy distributions as narrow as 31 meV (full width at half-maximum)

New Insights from Electron Spin Polarization Studies of Surfaces

April 1, 1983
Author(s)
Daniel T. Pierce, Robert Celotta
Examples of recent investigations in several laboratories, where measurement of effects due to electron spin polarization provided new insight into surface phenomena, will be reviewed. The results to be discussed include the use of spin dependent electron

The Diamond (111) Surface: A Dilemma Resolved

January 1, 1983
Author(s)
B B. Pate, B Waclawski, P M. Stefan, C Binns, T Ohta, M H. Hecht, P J. Jupiter, M L. Shek, Daniel T. Pierce, Nils Swanson, Robert Celotta, I. Lindau, W E. Spicer

Spin-Polarized Inverse Photoelectron Spectroscopy of Solid Surfaces: Ni(110)

October 4, 1982
Author(s)
John Unguris, A Seiler, Robert Celotta, Daniel T. Pierce, Philip Johnson, N. Smith
Inverse photoemission spectra have been measured on Ni(110) at 9.7-eV photon energy with a spin-polarized electron source. Consistent with band theory, a d-band-derived peak is observed just above the Fermi level that corresponds to transitions to minority