Magnetic x-ray dichroism in the spectroscopy of ultrathin magnetic alloy films

1996 ◽  
Vol 14 (4) ◽  
pp. 3171 ◽  
Author(s):  
J. G. Tobin
Keyword(s):  
Magnetic Alloy ◽  
Alloy Films ◽  
X Ray

Magnetic x-ray linear dichroism in the photoelectron spectroscopy of ultrathin magnetic alloy films

1996 ◽  
Vol 79 (8) ◽  
pp. 5626 ◽  
Author(s):  
J. G. Tobin ◽  
K. W. Goodman ◽  
G. J. Mankey ◽  
R. F. Willis ◽  
J. D. Denlinger ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Linear Dichroism ◽  
Magnetic Alloy ◽  
Alloy Films ◽  
X Ray

scholarly journals Correlation Of Magnetic Dichroism in X-Ray Absorption and Photoelectron Emission using Ultrathin Magnetic Alloy Films

1996 ◽  
Vol 437 ◽  
Author(s):  
J.G. Tobin ◽  
K.W. Goodman ◽  
G.J. Mankey ◽  
R.F. Willis ◽  
J.D. Denlinger ◽  
...  
Keyword(s):  
Light Source ◽  
Linear Dichroism ◽  
Magnetic Alloy ◽  
Photoelectron Emission ◽  
Alloy Films ◽  
X Ray ◽  
Magnetic Dichroism ◽  
Advanced Light Source ◽  
First Results ◽  
X Ray Absorption

AbstractWe have begun a program to characterize magnetic alloy overlayers using both magnetic x-ray circular dichroism (MXCD) and magnetic x-ray linear dichroism (MXLD). This will allow a direct comparison of MXCD-absorption and MXLD-photoelectron emission. First results from the Advanced Light Source will be presented.

Influence of Interfacial Copper on the Ti-SiO2 Reaction During Nitridation of Cu-Ti Films

1995 ◽  
Vol 398 ◽  
Author(s):  
Daniel Adams ◽  
T.L. Alford ◽  
N.D. Theodore ◽  
T. Laursen ◽  
S.W. Russell ◽  
...  
Keyword(s):  
Free Surface ◽  
High Resolution ◽  
Consumption Rate ◽  
Catalytic Effect ◽  
Energy Dispersive ◽  
Ti Alloy ◽  
Alloy Films ◽  
X Ray ◽  
20 Nm ◽  
Ti Films

ABSTRACTCu(90 nm)/Ti(20 nm) bilayers and Cu(Ti 27 at.%) alloy films were deposited on SiO2 and annealed in an NH3 ambient at temperatures 400–700° C for 30 min. During annealing Ti segregated to both the free surface and the alloy/SiO2 interface. At the surface Ti reacted with NH3 to form TiN, whereas at the interface the Ti reacted with the SiO2 to form a TiO/Ti5Si3 structure. High resolution energy dispersive x-ray analysis revealed the presence of interfacial Cu between the Ti-silicide and Ti-oxide layers at temperatures greater than 450°C. Using Cu-Ti alloy films enhanced the Si02 consumption rate by a factor of 3-4 compared to that of pure Ti. It is suggested that the interfacial Cu is responsible for the increased rate. It is plausible that an interfacial Cu2O component has a catalytic effect on the Ti- SiO2 reaction.

Unveiling the Magnesium Storage Mechanisms of Co-Sputtered Indium-Tin Alloy Films Using Operando X-ray Diffraction

2021 ◽  
Author(s):  
Wenrun Cui ◽  
Meijia Song ◽  
Guixing Jia ◽  
Yu Wang ◽  
Wanfeng Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Single Phase ◽  
Clear Understanding ◽  
X Ray Diffraction ◽  
Alloy Films ◽  
X Ray ◽  
Electrochemical Reactivity ◽  
One Step ◽  
Magnesium Ion Batteries ◽  
Pure Sn

Abstract Tin (Sn)-based anodes have drawn extensive attention for magnesium ion batteries (MIBs) owing to their low reaction potentials, high theoretical capacities, and compatibility with conventional electrolytes. However, their poor electrochemical reactivity, sluggish kinetics, and large volume changes have obstructed progresses. Additionally, a clear understanding of the Mg storage chemistry is crucial for the development of high-performance MIBs. Here, we prepared self-supporting In-Sn alloy films with different compositions and phase constitutions via a one-step magnetron co-sputtering. As benchmarked with pure Sn film, the single-phase and biphase In-Sn alloy films effectively trigger the alloying reaction of Sn with Mg and further increasing of In significantly improves the electrochemical reactivity of the In-Sn electrodes. More importantly, operando X-ray diffraction was performed to unveil the magnesiation/demagnesiation mechanisms of the In0.2Sn0.8, In0.2Sn0.8/In3Sn and In3Sn electrodes, showing that In0.2Sn0.8 and In3Sn display different Mg storage mechanisms when existing alone or biphase coexisting. Our findings highlight the significance of the electrode design and mechanism investigations for MIBs.

Morphology of epitaxial magnetic alloy nanostructures grown on WSe2(0001) studied by grazing-incidence small-angle X-ray scattering

2011 ◽  
Vol 44 (6) ◽  
pp. 1173-1181 ◽  
Author(s):  
Mireille Maret ◽  
Fabiola Liscio ◽  
Denys Makarov ◽  
Jean-Paul Simon ◽  
Yves Gauthier ◽  
...  
Keyword(s):  
Small Angle ◽  
Formation Enthalpy ◽  
Side Wall ◽  
Grazing Incidence ◽  
Magnetic Alloy ◽  
Scanning Tunnelling Microscope ◽  
X Ray ◽  
X Ray Scattering ◽  
Alloy Nanostructures ◽  
Ray Scattering

The morphology of epitaxial alloy nanostructures grown on a van der Waals-type WSe2(0001) surface was studied using grazing-incidence small-angle X-ray scattering (GISAXS). Assemblies of 111-oriented islands of (Co,Cr)Pt3and (Co,Fe)Pt alloys were grown at different deposition temperatures, with nominal thicknesses from 0.1 to 3 nm, resulting in various island densities. Evaluation of the GISAXS patterns indicates that for similar growth conditions CrPt3islands are flatter than CoPt or FePt islands and exhibit larger island volumes. These features are correlated with the better wetting behaviour and more negative formation enthalpy of the CrPt3alloy. For dense arrays of self-assembled CoPt islands, much smaller island volumes are extracted from GISAXS experiments than are observed by scanning tunnelling microscope imaging, which indicates that only the upper parts of the islands contribute to the GISAXS signal. Another aspect that needs to be taken into account for interpreting GISAXS patterns is the sensitivity of GISAXS to facetting and thus its capacity to extract the island shape. The latter is strongly dependent on the island size. For islands with an average volume smaller than ∼20 nm3, the shape cannot be determined unequivocally. Furthermore, for dense island assemblies with some size dispersity, the identification of steep side-wall facets from the GISAXS patterns is not straightforward as observed for truncated tetrahedron-shaped CoPt3islands.

scholarly journals Validation of secondary fluorescence excitation in quantitative X-ray fluorescence analysis of thin alloy films

2020 ◽  
Vol 35 (8) ◽  
pp. 1664-1670
Author(s):  
André Wählisch ◽  
Cornelia Streeck ◽  
Philipp Hönicke ◽  
Burkhard Beckhoff
Keyword(s):  
Thin Films ◽  
Fluorescence Analysis ◽  
Fluorescence Excitation ◽  
Alloy Films ◽  
X Ray ◽  
Secondary Fluorescence

Reference-free X-ray fluorescence analysis of multilayered, alloyed thin films in the μm regime with significant secondary fluorescence contributions.

X-ray diffraction investigations on Au/Si alloy films

1985 ◽  
Vol 22-23 ◽  
pp. 638-644 ◽  
Author(s):  
W. Fischer ◽  
P. Wissmann ◽  
H. Zitzmann
Keyword(s):  
X Ray Diffraction ◽  
Alloy Films ◽  
X Ray

Mesoporous Co–B amorphous alloy films with enhanced catalytic efficiency prepared from a mixed-surfactant solution

2009 ◽  
Vol 24 (11) ◽  
pp. 3300-3307 ◽  
Author(s):  
Hui Li ◽  
Jun Liu ◽  
Haixia Yang ◽  
Hexing Li
Keyword(s):  
Amorphous Alloy ◽  
Photoelectron Spectroscopy ◽  
Active Sites ◽  
Chemical Reduction ◽  
Surfactant Solution ◽  
Mesoporous Structure ◽  
Mixed Surfactant ◽  
Alloy Films ◽  
X Ray ◽  
Electron Micrography

Co–B films were synthesized through the solvent evaporation-assisted chemical reduction method by using a mixed-surfactant solution containing Span 40 and (1S)-(+)-10-camphorsulfonic acid. With the characterization of x-ray diffraction, selected-area electron diffraction, x-ray photoelectron spectroscopy, scanning electron micrography, and transmission electron micrography, the resulting Co–B films were identified to be amorphous alloys with mesoporous structure. The synergistic effect of two kinds of surfactants is essential for the formation of mesoporous structure. During liquid-phase cinnamaldehyde hydrogenation to cinnamyl alcohol, the mesoporous Co–B amorphous alloy films exhibited a much higher activity and better selectivity than the solid Co–B nanoparticles prepared by direct reduction of cobalt ions with borohydride. The enhanced activity is attributed to both the mesoporous and the film structure, which provides more Co active sites for the adsorption and diffusion of reactant molecules. The improved selectivity may be related to the difference in surface curvature.

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