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Search Publications by: Daniel T Pierce (Assoc)

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Displaying 101 - 125 of 308

Magnetic Moments in Cr Thin Films on Fe(100)

January 1, 1993
Author(s)
Daniel T. Pierce, Robert Celotta, John Unguris
The magnetism at the surface of a Cr film grown epitaxially on a Fe(100) whisker is observed as a function of Cr thickness by scanning electron microscopy with polarization analysis. Use of a wedge-shaped film of linearly increasing thickness allows the

Magnetism in Cr Thin Films on Fe(100)

January 1, 1992
Author(s)
John Unguris, Robert Celotta, Daniel T. Pierce
The spin polarization of secondary electrons from a Cr film on Fe(100), measured with scanning electron microscopy with polarization analysis, oscillates as a function of Cr thickness with a period near two atomic layers, consistent with incommensurate

Microscopic Aspects of the Initial Growth of Metastable fcc Iron on the Au(111)

January 1, 1992
Author(s)
Joseph A. Stroscio, Daniel T. Pierce, Robert A. Dragoset, P First
We report on the microscopic aspects of the growth of Fe on the Au(111) surface observed with scanning tunneling microscopy. Nucleation of triangular Fe islands is observed to occur at the corners of the herringbone reconstruction of the Au(111) surface

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

A System for the Study of Magnetic Materials and Magnetic Imaging with the STM

January 1, 1991
Author(s)
P First, Joseph A. Stroscio, Daniel T. Pierce, Robert A. Dragoset, Robert Celotta
A report of work in progress to determine the feasibility of imaging the magnetization of ferromagnetic samples with the scanning tunneling microscope (STM) is presented. A vacuum system was designed to test several different proposals as well as to

Micromagnetics of Domain Walls At Surfaces

January 1, 1991
Author(s)
M Scheinfein, John Unguris, J L. Blue, Kevin Coakley, Daniel T. Pierce, Robert Celotta, P J. Ryan
High-spatial-resolution magnetization maps of ferromagnetic surfaces are generated with use of scanning electron microscopy with polarization analysis (SEMPA). The structure of surface Neel walls is measured by SEMPA and compared directly to the results of

Scanning Electron Microscopy with Polarization Analysis (SEMPA) Studies of Domains, Domain Walls and Magnetic Singularities at Surfaces and in Thin Films

January 1, 1991
Author(s)
M Scheinfein, John Unguris, M Aeschlimann, Daniel T. Pierce, Robert Celotta
Scanning Electron Microscopy with Polarization Analysis (SEMPA) is used to investigate the surface magnetic microstructure of domain walls in thin permalloy films and the domain structure of magneto-optic TbFeCo alloys. Domain wall measurements confirm the