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Search Publications by: Daniel T Pierce (Assoc)

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Displaying 76 - 100 of 308

Coarsening of Unstable Surface Features During Fe(001) Homoepitaxy

January 1, 1995
Author(s)
Joseph A. Stroscio, Daniel T. Pierce, Mark D. Stiles, A Zangwill, L Sander
The evolution of the surface profile during homoepitaxial growth of Fe(001) is studied by scanning tunnelling microscopy and reflection high energy electron diffraction. The observed morphology exhibits a non-self affine collection of mound-like features

Tunneling Spectroscopy of bcc(001) Surface States

January 1, 1995
Author(s)
Joseph A. Stroscio, Daniel T. Pierce, Angela Davies, Robert Celotta
We have discovered an intense, sharp feature in tunneling spectra of the Fe(001) and Cr(001) surfaces that derives from a bce surface state near the Fermi level. Band-structure calculations show that this state is a general feature of bcc (001) surfaces

Hot Electron Spin-Valve Effect in Coupled Magnetic Layers

January 1, 1994
Author(s)
Robert Celotta, John Unguris, Daniel T. Pierce
SEMPA observations of magnetic exchange coupling in the Fe/Ag/Fe, Fe/Au/Fe, and Fe/Cr/Fe systems reveal an intensity variation in the emitted secondary electron signal that depends only on whether the Fe layers are coupled in a ferromagnetic or

Influence of Cr Growth on Exchange Coupling in Fe/Cr/Fe(100)

January 1, 1994
Author(s)
Daniel T. Pierce, Joseph A. Stroscio, John Unguris, Robert Celotta
Scanning electron microscopy with polarization-analysis (SEMPA) measurements of the dependence of the oscillations of the exchange coupling in Fe/Cr/Fe(100) structures on the Cr growth temperature are correlated with the thickness fluctuations in Cr films

Oscillatory Exchange Coupling in Fe/Au/Fe(100)

January 1, 1994
Author(s)
John Unguris, Robert Celotta, Daniel T. Pierce
Scanning electron microscopy with polarization analysis was used to investigate the interlayer exchange coupling in Fe/Au/Fe(100) sandwich structures. The films were epitaxially grown on single-crystal Fe(100) substrates. Electron diffraction measurements

Scaling of Diffusion-Mediated Island Growth in Iron on Iron Homoepitaxy

January 1, 1994
Author(s)
Joseph A. Stroscio, Daniel T. Pierce
An analysis of the island size and separation distributions of Fe islands, observed in the initial stages of growth in the homoepitaxy of Fe on Fe(001) whiskers, shows scaling properties recently predicted in nucleation and growth theories. A critical size

The Growth of Iron on Iron Whiskers

January 1, 1994
Author(s)
Joseph A. Stroscio, Daniel T. Pierce
Real space views of the homoepitaxial growth of Fe on Fe(001) whiskers is reported, observed by scanning tunneling microscopy (STM), during the initial stages of growth. Scaling of the Fe island sizes and separation distributions are observed as a function

Simple, Compact, High-Purity Cr Evaporator for UHV

September 1, 1993
Author(s)
Jabez J. McClelland, John Unguris, R E. Scholten, Daniel T. Pierce
A simple, compact Cr evaporator is constructed by electroplating Cr metal onto the tip of a W hairpin filament. At 5 cm from the evaporator, deposition rates up to 10 nm min -1 (flux {asymp} 10 19 atoms m -2s -1) have been obtained, with total deposition