Magnetic short range order above Tc in an amorphous iron based alloy

1986 ◽  
Vol 62 (1) ◽  
pp. 127-133 ◽  
Author(s):  
P. Mangin ◽  
P.J. Brown ◽  
C. Tête
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Amorphous Iron ◽  
Iron Based

scholarly journals Atomic short-range order in mechanically synthesized iron based Fe-Zn alloys studied by 57Fe Mössbauer spectroscopy

Nukleonika ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Robert Konieczny ◽  
Rafał Idczak
Keyword(s):  
Mössbauer Spectroscopy ◽  
Short Range ◽  
Short Range Order ◽  
Mossbauer Spectroscopy ◽  
Range Order ◽  
Impurity Atoms ◽  
Mößbauer Spectroscopy ◽  
Nanocrystalline Iron ◽  
Iron Based ◽  
Zn Alloys

Abstract Mechanical alloying method was applied to prepare nanocrystalline iron-based Fe1−xZnx solid solutions with x in the range 0.01 ≤ x ≤ 0.05. The structural properties of the materials were investigated with the Mössbauer spectroscopy by measuring the room temperature spectra of 57Fe for as-obtained and annealed samples. The spectra were analyzed in terms of parameters of their components related to unlike surroundings of the iron probes, determined by different numbers of zinc atoms existing in the neighborhood of iron atoms. The obtained results gave clear evidence that after annealing process, the distribution of impurity atoms in the first coordination spheres of 57Fe nuclei is not random and it cannot be described by binomial distribution. The estimated, positive values of the short-range order parameters suggest clustering tendencies of Zn atoms in the Fe-Zn alloys with low zinc concentration. The results were compared with corresponding data derived from Calphad calculation and resulting from the cellular atomic model of alloys by Miedema.

scholarly journals Temperature dependence of the short-range order parameter for Fe0.90Cr0.10 and Fe0.88Cr0.12 alloys

Nukleonika ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Rafał Idczak ◽  
Robert Konieczny
Keyword(s):  
Thermal Processing ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Temperature Dependent ◽  
Iron Matrix ◽  
Impurity Atoms ◽  
Chemical Type ◽  
Different Temperatures ◽  
Iron Based

Abstract The 57Fe Mössbauer spectra for the iron-based solid solutions Fe0.90Cr0.10 and Fe0.88Cr0.12 were measured at different temperatures ranging from 300 K to 900 K. Analysis of the obtained spectra shows that the distribution of impurity atoms in the two first coordination shells of 57Fe nuclei is not random and it cannot be described by the binomial distribution. Quantitatively, the effects were described in terms of the atomic short-range order (SRO) parameters and the pair-wise interaction energy with the help of a quasi-chemical type formulation introduced by Cohen and Fine. The obtained results reveal strong clustering-type correlations in the studied samples (a predominance of Fe-Fe and Cr-Cr bonds). Moreover, the changes in SRO values observed during thermal processing suggest that the distribution of Cr atoms in an α-iron matrix is strongly temperature dependent.

Short-range order effects in amorphous FexSi1-x/Si multilayers induced by preparation conditions

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-175-Pr2-178 ◽  
Author(s):  
G. T. Pérez ◽  
F. H. Salas ◽  
R. Morales ◽  
L. M. Álvarez-Prado ◽  
J. M. Alameda
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Effects ◽  
Preparation Conditions

SHORT RANGE ORDER IN QUENCHED Ni4Mo

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-173-C7-173
Author(s):  
J.-P. CHEVALIER ◽  
W. M. STOBBS
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order
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