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Search Publications by: Daniel T Pierce (Assoc)

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Displaying 151 - 175 of 308

Improved Low-Energy Diffuse Scattering Electron-Spin Polarization Analyzer

January 1, 1989
Author(s)
M Scheinfein, Daniel T. Pierce, John Unguris, Jabez J. McClelland, Robert Celotta, Michael H. Kelley
An improved low-energy diffuse scattering electron-spin polarization analyzer is described. It is based on the low-energy (150 eV) diffuse scattering of polarized electrons from polycrystalline evaporated Au targets. By collecting large solid angles and

Influence of the Surface on Magnetic Domain Wall Microstructure

January 1, 1989
Author(s)
M Scheinfein, John Unguris, Robert Celotta, Daniel T. Pierce
The magnetization orientations in domain walls at the surfaces of an Fe crystal, a ferromagnetic glass, and a Permalloy film, measured by scanning electron microscopy with polarization analysis, exhibit asymmetric surface Neacute}el wall profiles which (1)

Magnetic Microstructure of the (0001) Surface of the HCP Cobalt

January 1, 1989
Author(s)
John Unguris, M Scheinfein, Robert Celotta, Daniel T. Pierce
The magnetic domain structure of the (0001) surface of a hcp cobalt crystal was investigated using scanning electron microscopy with polarization analysis (SEMPA). This is the first observation by SEMPA of both out-of-plane and in-plane magnetization

Metallicity and Gap States in Tunneling to Fe Clusters on GaAs(110)

January 1, 1989
Author(s)
P First, Joseph A. Stroscio, Robert A. Dragoset, Daniel T. Pierce, Robert Celotta
We report the characteristics of tunneling to a GaAs(110) substrate with distinct, nanometer-size Fe clusters, as a function of distance from and size of the clusters. We show that Fe clusters of volumes 150 Aring} 3, corresponding to =13 atoms, are

Domain Images of Ultrathin Fe Films on Ag(100)

May 30, 1988
Author(s)
J L. Robins, Robert Celotta, John Unguris, Daniel T. Pierce, B Jonker, G Prinz
Scanning electron microscopy with electron polarization analysis has been used to image domains of ultrathin Fe films grown epitaxially on a Ag(100) substrate. Room-temperature measurements show clearly the existence of large domains of in-plane

Electron Spin Polarization Analyzers for Use with Synchrotron Radiation

April 1, 1988
Author(s)
Daniel T. Pierce, Robert Celotta, Michael H. Kelley, John Unguris
The measurement of the spin polarization of photoelectrons emitted from a magnetic material is discussed. An important consideration is the acceptance phase space of the spin analyzer relative to the phase space of the photoemitted electrons to be measured