The Magnetic Behaviour of FeAl Alloys of B2-Structure Investigated by Mössbauer Spectroscopy

1970 ◽  
Vol 41 (1) ◽  
pp. 255-263 ◽  
Author(s):  
R. Hergt ◽  
E. Wieser ◽  
H. Gengnagel ◽  
A. Gladun
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Magnetic Behaviour ◽  
Al Alloys ◽  
Mößbauer Spectroscopy ◽  
B2 Structure

Study of Point Defects in Fe-Al System by Mössbauer Spectroscopy and XRD Method

2013 ◽  
Vol 203-204 ◽  
pp. 343-346
Author(s):  
Aneta Hanc-Kuczkowska
Keyword(s):  
Mössbauer Spectroscopy ◽  
Point Defect ◽  
Defect Formation ◽  
Mossbauer Spectroscopy ◽  
Local Environment ◽  
Al Content ◽  
Mößbauer Spectroscopy ◽  
Quadruple Splitting ◽  
B2 Structure ◽  
Xrd Method

In this work, the Mössbauer spectroscopy employed in a study of point defect formation in intermetallic phases of the B2 structure from the Fe-Al system as a function of Al concentration. We present the values of the 57Fe isomer shift and quadruple splitting for the components describing the point defect in the local environment of a Mössbauer nuclide. The concentration of the Fe vacancies and Fe atoms substituting Al (Fe-AS) are determined. The results shown that an increase in Al content causes an increase in vacancy and Fe-AS concentration.

A Study of Point Defects in the B2-Phase Region of the Fe–Al system by Mössbauer Spectroscopy

2010 ◽  
Vol 163 ◽  
pp. 299-302 ◽  
Author(s):  
Magdalena Jabłońska ◽  
Aneta Hanc ◽  
Anna Szostak
Keyword(s):  
Mössbauer Spectroscopy ◽  
Point Defect ◽  
Defect Formation ◽  
Mossbauer Spectroscopy ◽  
Local Environment ◽  
Phase Region ◽  
Al Content ◽  
Mößbauer Spectroscopy ◽  
Quadruple Splitting ◽  
B2 Structure

In this work, we employed the Mössbauer spectroscopy in a study of point defect formation in intermetallic phases of the B2 structure from the Fe-Al system as a function of Al concentration. We present the values of the 57Fe isomer shift and quadruple splitting for the components describing the point defect in the local environment of a Mössbauer nuclide. The concentration of the Fe vacancies and Fe atoms substituting Al (Fe-AS) are determined. The results shown that an increase in Al content causes an increase in vacancy and Fe-AS

Nanometer scale intermixing mechanism in Ag-based nanocomposites

2000 ◽  
Vol 644 ◽  
Author(s):  
Adrian D. Jianu ◽  
Victor E. Kuncser ◽  
Radu C. Nicula ◽  
Petre Palade ◽  
Manuela E. Stir ◽  
...  
Keyword(s):  
Grain Size ◽  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Relaxation Effect ◽  
High Energy ◽  
Magnetic Behaviour ◽  
Nanometer Scale ◽  
Mößbauer Spectroscopy ◽  
Fe Powder ◽  
Average Grain Size

AbstractA new Ag-Sm-Fe nanocomposite material was obtained by high-energy ball-milling of elemental μ-Fe powder and melt-spun Ag-Sm flakes. Magnetic Fe nanocrystals were thus embedded in a paramagnetic Ag-based matrix. Synchrotron radiation powder diffraction and temperature dependent Mössbauer spectroscopy were used to study the nanometer scale Fe/Ag(Sm) intermixing mechanism. The evolution of the average grain size and microstrains in the Ag-based matrix vs. the milling time were obtained from the analysis of the X-ray diffraction linewidths. For reference Fe powder samples, a bimodal grain size distribution was evidenced by Mössbauer spectroscopy. The magnetic behaviour of the Fe nanocrystals was analysed with respect to the superparamagnetic relaxation effect and collective excitations. The nanometer scale intermixing of Fe nanocrystals in the Ag-based matrix is completed when the Fe and matrix grains have comparable dimensions.

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