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Search Publications by: Daniel T Pierce (Assoc)

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Displaying 126 - 150 of 308

180deg Surface Domain Wall Magnetization Profiles: Comparisons Between Scanning Electron Microscopy with Polarization Analysis Measurements, Magneto-Optic Kerr Microscopy Measurements and Micromagnetic Models

January 1, 1990
Author(s)
M Scheinfein, P J. Ryan, John Unguris, Daniel T. Pierce, Robert Celotta
We compare measurements of magnetization profiles across a 180° surface domain wall in a 0.24-υm-thick of Permalloy (Ni 81Fe 19), obtained with scanning electron microscopy with polarization analysis (SEMPA) and longitudinal magneto-optic (MO) Magneto

Dispersion of Evanescent Band Gap States in Fe Clusters on GaAs(110)

January 1, 1990
Author(s)
Joseph A. Stroscio, P First, Robert A. Dragoset, L Whitman, Daniel T. Pierce, Robert Celotta
We report scanning tunneling microscopy results on the band gap states observed in tunneling to nanometer size metallic Fe clusters on GaAs(110) surfaces. In the vicinity of the Fe clusters, a continuum of gap states is found in tunneling spectra from

High Spatial Resolution Quantitative Micromagnetics

January 1, 1990
Author(s)
M Scheinfein, John Unguris, Daniel T. Pierce, Robert Celotta
Magnetization profiles at surfaces are observed with scanning electron microscopy with polarization analysis (SEMPA). This technique allows for quantitative analysis of the vector magnetization profile with 70 nm spatial resolution. Magnetization profiles

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

Surface Magnetic Microstructure

January 1, 1990
Author(s)
M Scheinfein, John Unguris, Robert Celotta, Daniel T. Pierce
The way in which a magnetic solid minimizes its energy through the formation of domains and domain walls is strongly influenced by the presence of the surface. At the surface, a bulk Blich wall may change into a Neel wall in order to reduce the magnetic

Surface, Interface and Thin-Film Magnetism

January 1, 1990
Author(s)
L Falicov, Daniel T. Pierce, S Bader, R Gronsky, K Hathaway, H Hopster, D Lambeth, S Parkin, G Prinz, M Salamon, Ivan K. Schuller, R Victora
A comprehensive review and state of the art in the field of surface, interface, and thin-film magnetism is presented. New growth techniques which produce atomically engineered novel material, special characterization techniques to measure meagnetic

Use of Thorium as a Target in Electron Spin Analyzers

April 1, 1989
Author(s)
Jabez J. McClelland, M Scheinfein, Daniel T. Pierce
Measurements of the effective Sherman function have been carried out for 10-100-keV spin-polarized electrons scattering from a thick thorium target in a retarding Mott analyzer. At 20 and 100 keV the dependence on the maximum energy loss accepted by the

Characterization of Epitaxial Fe on GaAs(110) By Scanning Tunneling Microscopy

January 1, 1989
Author(s)
Robert A. Dragoset, P First, Joseph A. Stroscio, Daniel T. Pierce, Robert Celotta
Iron on GaAs(110) comprises an interesting system not only due to small lattice mismatch, 1.4%, but also because of the magnetic properties of the overlayer. In the present work, scanning tunneling microscopy (STM) was used to investigate bcc Fe films in