Silicide Formation at Fe-Si Interfaces Studied by Mössbauer Spectroscopy and Rutherford Backscattering

1980 ◽  
Vol 3 ◽  
Author(s):  
R. L. Cohen ◽  
L. C. Feldman ◽  
K. W. West ◽  
P. J. Silverman
Keyword(s):  
Mössbauer Spectroscopy ◽  
Room Temperature ◽  
Mossbauer Spectroscopy ◽  
Rutherford Backscattering ◽  
Silicide Formation ◽  
Substrate Preparation ◽  
Surface Sensitivity ◽  
Mößbauer Spectroscopy ◽  
Natural Iron ◽  
Enhanced Surface

EXTENDED ABSTRACTWe have deposited the Mössbauer isotope Fe 57 on (111) Si surfaces at room temperature and measured the Mössbauer spectrum using conversion electron Mössbauer spectroscopy for enhanced surface sensitivity. Samples were examined as a function of substrate preparation and thermal anneal. Rutherford backscattering was used to monitor sample preparation. The Fe 57 layers have been coated with natural iron (2.2% Fe 57) or silver to prevent them from oxidizing when exposed to air. The known distinctive Mössbauer spectra of Fe, FeSi, FeSi 2 , Fe in Si, and Si in Fe allows the identification of these phases in the samples.

Fe-Silicides Formed with Molecular Beam Epitaxy and Studied with Conversion Electron Mössbauer Spectroscopy

1993 ◽  
Vol 320 ◽  
Author(s):  
S. Degroote ◽  
M.H. Langelaar ◽  
T. Kobayashi ◽  
J. Dekoster ◽  
J. De Wachter ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Conversion Electron ◽  
Room Temperature ◽  
Mossbauer Spectroscopy ◽  
Ex Situ ◽  
Silicide Formation ◽  
Conversion Electron Mössbauer Spectroscopy ◽  
Mößbauer Spectroscopy ◽  
Conversion Electron Mossbauer Spectroscopy

ABSTRACTFe-sulicides were formed by annealing MBE-deposited thin 57Fe layers with thicknesses between 20 Å and 60 Å on (7x7) reconstructed Si(111) substrates. During the growth the substrate was held at room temperature. The silicide formation upon annealing in the temperature range of 200°C to 900°C was studied in-situ with RH-EED. Samples were studied with in-situ CEMS (Conversion Electron Mossbauer Spectroscopy) as well as with ex-situ CEMS after covering with Ag to prevent oxidation. RBS/Channeling was used to study the epitaxial quality and the structure of these layers.Using the 57Fe nuclear probe, it is shown that silicide formation occurs at the interface already at room temperature. Metastable silicides with cubic structure are observed in the low temperature annealing range, and characterized by their Mossbauer parameters. At higher temperatures stable ε-FeSi and β-FeSi2 are formed.

Intramolecular rotations and electronic states of iron in the iron bis(dicarbollide) complex Fe[(C2B9H11)2] studied by a 57Fe nuclear probe and computational methods

2021 ◽  
Author(s):  
Katarzyna Bednarska-Szczepaniak ◽  
Katarzyna Dziedzic-Kocurek ◽  
Ewelina Przelazły ◽  
Jan Stanek ◽  
Zbigniew Jan Lesnikowski
Keyword(s):  
Mössbauer Spectroscopy ◽  
Computational Methods ◽  
Room Temperature ◽  
Mossbauer Spectroscopy ◽  
Electronic States ◽  
Mößbauer Spectroscopy

Mössbauer spectroscopy of iron(III)bis(dicarbollide) (1) and its adduct (2) revealed low spin FeIII in 1 and supprasingly FeII in 2. In 1 the (C2B9H11) rotate at room temperature with 107...

Mössbauer spectroscopy study of surfactant sputtering induced Fe silicide formation on a Si surface

2015 ◽  
Vol 357 ◽  
pp. 493-497
Author(s):  
C. Beckmann ◽  
K. Zhang ◽  
H. Hofsäss ◽  
C. Brüsewitz ◽  
U. Vetter ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Spectroscopy Study ◽  
Silicide Formation ◽  
Mößbauer Spectroscopy

MÖssbauer Study of a Tinife Shape Memory Alloy.

1991 ◽  
Vol 246 ◽  
Author(s):  
M. Jimenez ◽  
V. Marquina ◽  
S. Aburto ◽  
M.L. Marquina ◽  
R. Gomez ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Shape Memory ◽  
Room Temperature ◽  
Mossbauer Spectroscopy ◽  
Density Wave ◽  
Quadrupole Doublet ◽  
Mössbauer Study ◽  
Scanning Calorimetry ◽  
Mößbauer Spectroscopy ◽  
Wave Induced

AbstractMÖssbauer spectroscopy is very sensitive to structural transitions that may occur during a phase change of the type known to arise in the shape memory TiNiFe alloy. In this work we present the results of resistance vs temperature, differential scanning calorimetry (DSC) and Mössbauer spectroscopy (MS) measurements in Ti50Ni47Fe3 sample. The resistance vs temperature curve shows the usual sharp increase associated to the B2 → R transition at Tp = 245 K and then raises until a maximum is attained at ∼ 150 K. The DSC curve shows a peak maximum at the same temperature where the resistivity starts to increase. The room temperature Mössbauer spectrum consists of a single line, indicating that the iron atoms have cubic surroundings. As temperature is lowered, a small asymmetric quadrupole doublet begins to develop. The isomer shift (I.S.) and quadrupole splitting (ΔQ) values of this doublet increase with decreasing temperature until almost constant values are achieved at temperatures ∼ 100 K. We relate the changes in the Mössbauer spectra with previously proposed charge density wave induced premartensitic transition.

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