Growth and structure of cobalt oxide on (001) bct cobalt film

Valeri, Sergio; Borghi, Adriana Del; Gazzadi, G. C.; Bona, A. di

doi:10.1016/s0039-6028(98)00929-7

Cited by 61 publications

(33 citation statements)

References 40 publications

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“…5, reveals that a shoulder develops at a roughly 2 eV lower binding energy, with respect to the Co 2p 3/2 main peak. This is consistent with the presence of a small quantity of metallic Co [19,20], which is likely to come from the reduction of CoO, due to its proximity with the Fe top layer. Such a component was absent in the Co 2p spectra taken on the CoO/Fe bilayers, for any CoO thickness, even at the very first stages of growth.…”

Section: Resultssupporting

confidence: 80%

“…Inspection of the Co 2p lineshape for the 20 ML CoO/Fe bilayer reveals that only cobalt monoxide is present in our bilayers, while the presence of higher valence cobalt oxides can be neglected. This is demonstrated by comparing the lineshapes in our results with those of reference spectra from the literature [18][19][20], and by evaluating the XPS intensity ratios between the Co 2p 1/2 main line and its satellite or between the Co 2p 1/2 main line and the O 1s spectrum. Such ratios are indeed very close to those reported in the literature (see, for example, Ref.…”

Section: Resultsmentioning

confidence: 85%

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Epitaxial growth and characterization of CoO/Fe(001) thin film layered structures

et al. 2008

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 85%

Epitaxial growth and characterization of CoO/Fe(001) thin film layered structures

et al. 2008

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“…Such a superposition model has been already proved to be successful in describing multilayered systems. 20,32,33 An IAD from 10-ML(40-ML)-thick Co film was used as reference bct (hcp) IAD, to synthetize IADs from bilayers with different thickness of the bct and hcp components. The relative weight of bct and hcp contribution to each IAD at intermediate coverage has been obtained by minimizing the R factor between the measured and synthetized IADs.…”

Section: Resultsmentioning

confidence: 99%

GROWTH MODE OF ULTRATHIN Co FILMS ON Fe(001) PREPARED BY LOW ENERGY ION-ASSISTED DEPOSITION

et al. 1999

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Co films were epitaxially grown on Fe(001) by simultaneous thermal evaporation of Co atoms and ion bombardment with low-energy (300-1000 eV) Ar ions in a wide range of ion-to-atom flux ratio (0.02-0.5). The 0-50 ML coverage range was investigated. Transition from island growth to a continuous layer growth occurs on passing from purely thermal to ion-assisted deposition procedure. Structural characterization was performed by Primary-beam Diffraction Modulated Electron Emission (PDMEE). For purely thermal deposition, transition from the bcc phase to the equilibrium, hcp phase has been observed at a critical coverage of about 15 ML, both structures showing a significant strain (7% contraction and 5% expansion with respect to the ideal bcc and hcp phase, respectively). Ion assistance has proved to be effective in lowering both the strains in the Co film and the critical thickness of the bcc phase.

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“…Calculated with the value of extrapolated data to zero coverage, the BE shift could be +0.094 eV. It is worth mentioning that the chemical shifts for various Co compounds could be as large as 5.00 eV [9] and the surface core-level shift (SCLS) of polycrystalline cobalt was determined as -1.10 eV [10]. The results in Fig.…”

Section: Co 2p Transitionmentioning

confidence: 99%

Photoemission Study of the Initial Growth of Co on Ru(0001)

et al. 2007

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The growth process of cobalt on Ru(0001) was characterized by photoelectron spectroscopy excited by X-ray and synchrotron radiation. The binding energy position and intensity of the Co 2p 3/2 and Ru 3d 5/2 core levels as well as the shape and structure of the valence band spectra corresponding to the different stages of the deposition were investigated. An observed small positive binding energy shift is a consequence of an increase in the cobalt adatoms coordination number. The core-level shift between bulk and surface Ru atoms is determined as −360 meV. Upon adsorption of cobalt, the interface peak appears with a shift of −(70 ÷ 80) meV relative to the bulk one. On the basis of unchanged energy positions and widths of the Ru-derived features of the valence band spectra, a weak interaction between cobalt and substrate is suggested. The measured valence band could be reproduced by superimposing the spectra of the pure elements.

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Growth and structure of cobalt oxide on (001) bct cobalt film

Cited by 61 publications

References 40 publications

Epitaxial growth and characterization of CoO/Fe(001) thin film layered structures

Epitaxial growth and characterization of CoO/Fe(001) thin film layered structures

GROWTH MODE OF ULTRATHIN Co FILMS ON Fe(001) PREPARED BY LOW ENERGY ION-ASSISTED DEPOSITION

Photoemission Study of the Initial Growth of Co on Ru(0001)

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