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Investigation of interface properties of Ni/Cu multilayers by high kinetic energy photoelectron spectroscopy

Granroth, Sari; Knut, Ronny; Marcellini, Moreno; Andersson, Gabriella; Svensson, Svante; Karis, Olof; Gorgoi, Mihaela; Schaefers, Franz; Braun, Walter and Eberhardt, Wolfgang, et al. (2009) In Physical Review B (Condensed Matter and Materials Physics) 80(9).
Abstract
High kinetic-energy photoelectron spectroscopy (HIKE) or hard x-ray photoelectron spectroscopy has been used to investigate the alloying of Ni/Cu (100) multilayers. Relative intensities of the corelevels and their chemical shifts derived from binding energy changes are shown to give precise information on physicochemical properties and quality of the buried layers. Interface roughening, including kinetic properties such as the rate of alloying, and temperature effects on the processes can be analyzed quantitatively. Using HIKE, we have been able to precisely follow the deterioration of the multilayer structure at the atomic scale and observe the diffusion of the capping layer into the multilayer structure which in turn is found to lead to... (More)
High kinetic-energy photoelectron spectroscopy (HIKE) or hard x-ray photoelectron spectroscopy has been used to investigate the alloying of Ni/Cu (100) multilayers. Relative intensities of the corelevels and their chemical shifts derived from binding energy changes are shown to give precise information on physicochemical properties and quality of the buried layers. Interface roughening, including kinetic properties such as the rate of alloying, and temperature effects on the processes can be analyzed quantitatively. Using HIKE, we have been able to precisely follow the deterioration of the multilayer structure at the atomic scale and observe the diffusion of the capping layer into the multilayer structure which in turn is found to lead to a segregation in the ternary system. This is of great importance for future research on multilayered systems of this kind. Our experimental data are supplemented by first-principles theoretical calculations of the core-level shifts for a ternary alloy to allow for modeling of the influence of capping materials on the chemical shifts. (Less)
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publishing date
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Contribution to journal
publication status
published
subject
keywords
spectra, X-ray photoelectron, nickel, magnetic multilayers, interface structure, diffusion, copper, chemical shift, ab initio calculations, alloying
in
Physical Review B (Condensed Matter and Materials Physics)
volume
80
issue
9
publisher
American Physical Society
external identifiers
  • wos:000270383000027
  • scopus:70350025150
ISSN
1098-0121
DOI
10.1103/PhysRevB.80.094104
language
English
LU publication?
yes
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9556ae61-fcfd-441c-b50d-64778380077c (old id 1489401)
date added to LUP
2009-10-22 11:50:53
date last changed
2017-01-01 06:17:55
@article{9556ae61-fcfd-441c-b50d-64778380077c,
  abstract     = {High kinetic-energy photoelectron spectroscopy (HIKE) or hard x-ray photoelectron spectroscopy has been used to investigate the alloying of Ni/Cu (100) multilayers. Relative intensities of the corelevels and their chemical shifts derived from binding energy changes are shown to give precise information on physicochemical properties and quality of the buried layers. Interface roughening, including kinetic properties such as the rate of alloying, and temperature effects on the processes can be analyzed quantitatively. Using HIKE, we have been able to precisely follow the deterioration of the multilayer structure at the atomic scale and observe the diffusion of the capping layer into the multilayer structure which in turn is found to lead to a segregation in the ternary system. This is of great importance for future research on multilayered systems of this kind. Our experimental data are supplemented by first-principles theoretical calculations of the core-level shifts for a ternary alloy to allow for modeling of the influence of capping materials on the chemical shifts.},
  author       = {Granroth, Sari and Knut, Ronny and Marcellini, Moreno and Andersson, Gabriella and Svensson, Svante and Karis, Olof and Gorgoi, Mihaela and Schaefers, Franz and Braun, Walter and Eberhardt, Wolfgang and Olovsson, Weine and Holmstroem, Erik and Mårtensson, Nils},
  issn         = {1098-0121},
  keyword      = {spectra,X-ray photoelectron,nickel,magnetic multilayers,interface structure,diffusion,copper,chemical shift,ab initio calculations,alloying},
  language     = {eng},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Investigation of interface properties of Ni/Cu multilayers by high kinetic energy photoelectron spectroscopy},
  url          = {http://dx.doi.org/10.1103/PhysRevB.80.094104},
  volume       = {80},
  year         = {2009},
}