Zobrazeno 1 - 10
of 190
pro vyhledávání: '"H. POPPA"'
Publikováno v:
Surface Science. 480:163-172
Magnetic transitions in ultrathin Fe films on the Cu(1 0 0) surface have been studied with spin polarized low energy electron microscopy. By monitoring averaged image intensity oscillations and the evolution of magnetization and magnetic domain struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a13a845ca86aa3a3d5064e91e67f876d
https://doi.org/10.1016/s0039-6028(01)00831-7
https://doi.org/10.1016/s0039-6028(01)00831-7
Publikováno v:
Solid State Communications. 104:787-792
The above-vacuum-threshold electronic structure of ultrathin Co films on W(110) is studied for coverages from 1 monoatomic layer (ML) upward. For n ML, the spin-dependent layer-projected local density of states (LDOS) for k = 0, which is calculated b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0ac6542809bcdee2372f1657682ff94
https://doi.org/10.1016/s0038-1098(97)00357-8
https://doi.org/10.1016/s0038-1098(97)00357-8
Publikováno v:
Journal of Solid State Chemistry. 106:55-65
Palladium clusters, 10-30 nm in size, were grown in UHV on amorphous carbon in a transmission electron microscope (TEM). The Pd catalyzed oxidation of carbon was then followed in situ in the TEM between 720 and 800 K at a pressure p of O2 with 0.25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ae587eb08e16b0760029595153bb54c
https://doi.org/10.1006/jssc.1993.1264
https://doi.org/10.1006/jssc.1993.1264
Publikováno v:
Thin Solid Films. 207:65-70
Transmission electron microscopy studies of small supported metal particles grown by vapor deposition under ultrahigh vacuum (UHV) conditions often require stabilizing overcoats (also called “fixing layers”) in order to preserve the initial struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9069e42eeed37a736b624057f74245ae
https://doi.org/10.1016/0040-6090(92)90103-i
https://doi.org/10.1016/0040-6090(92)90103-i
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 18:1845-1847
The spin-polarized low-energy electron microscope (SPLEEM) at NCEM has been utilized to examine the magnetic domain formation in thin films of Co grown on Au(111) single-crystal surfaces. A new, low-temperature liquid nitrogen cooling system has been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a434b16a9ee412c09e4d7a51e56b67bd
https://doi.org/10.1116/1.582433
https://doi.org/10.1116/1.582433
Publikováno v:
Langmuir. 7:2853-2859
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8dd286e9a263a0e1bf783e4840942ae
https://doi.org/10.1021/la00059a072
https://doi.org/10.1021/la00059a072
Autor:
H. Poppa, C.R. Henry
Publikováno v:
Thin Solid Films. 189:303-312
(111)-oriented MgO thin films were epitaxially grown on ultrahigh-vacuum-cleaved mica. The MgO films were characterized in situ by Auger electron spectroscopy (AES), energy loss spectroscopy (ELS), and electron energy loss fine structure (EELFS). AES
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92c66f819d52941ed7789d312b5d7821
https://doi.org/10.1016/0040-6090(90)90459-q
https://doi.org/10.1016/0040-6090(90)90459-q
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 51:321-330
We present high resolution SEMPA images of an Fe - 4% Si crystal. Also presented are a number of powerful image analysis techniques for revealing the information in magnetic micrographs. The spin polarized images are discussed within the framework of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54cfafd44e95ea1137edbb64ee66b21b
https://doi.org/10.1016/0368-2048(90)80164-6
https://doi.org/10.1016/0368-2048(90)80164-6
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 51:315-320
A scanning electron microscope with polarization analysis has been built using an Auger microprobe and a Mott analyser. The instrument uses a high brightness field emission source and has an analytical spatial resolution of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::666a04c45dcd509267d82f72e50d14f7
https://doi.org/10.1016/0368-2048(90)80163-5
https://doi.org/10.1016/0368-2048(90)80163-5
Publikováno v:
Vacuum. 41:485-488
Accurate sticking coefficient measurements of Pd on amorphous and single-crystal alumina supports as a function of metal exposure and support temperature are reported. Emphasis is placed on small metal exposures and some elevated temperatures, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14dcf017d734af727a49d3fdc5dfd9fa
https://doi.org/10.1016/0042-207x(90)90392-c
https://doi.org/10.1016/0042-207x(90)90392-c