Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 3

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Application of the ^{119}Sn Mössbauer-Effect Spectroscopy in the Investigation of Spin-Density-Waves in Chromium

100%
Dubiel S.
Acta Physica Polonica A
|
1993
|
vol. 84
|
issue 1
83-100
EN
Application of ^{119}Sn Mossbauer-effect spectroscopy in an investigation of spin-density-waves in chromium in terms of model calculations as well as of measurements on real samples is presented.
2
Content available remote

Simultaneous Analysis of Several Mössbauer Spectra

63%
Cieslak J., Dubiel S.
Acta Physica Polonica A
|
2008
|
vol. 114
|
issue 6
1691-1705
EN
A method based on a simultaneous fit of several Mössbauer spectra from a series of measurements is compared with the one based on an independent analysis of each spectrum. Three different algorithms, namely a least squares iteration procedure, a Gauss-Seidel function minimization and a genetic algorithm based method are applied and discussed. The conclusions drawn are supported by a simulated and a measured spectra analysis.
3
Content available remote

Mössbauer-Effect Study of Calciomagnetites

51%
Dubiel S., Cieślak J., Orewczyk J., Jasieńska S.
|
EN
Ca_{x}Fe_{3-x}O_{4} samples, with x ≤ 0.28 , prepared from α-Fe_{2}O_{3} and CaO by the Bridgman method were investigated by means of ^{57}Fe Mössbauer spectroscopy. Room temperature spectra gave evidence that the samples were multiphase, the calciomagnetite being the dominant phase with a contribution of 73% to 99%, depending on the sample. Analysis of the subspectra associated with the calciomagnetite gave evidence that Ca-ions reside on the tetrahedral (A) sites and have not random distribution. Their presence on those sites causes a reduction of the hyperfine field at Fe nuclei occupying the octahedral positions (B) by 12.3(1.0) kOe per one Ca-ion and a decrease in the average hf field, 〈H_{B}〉/dx, at the rate of 29 kOe/mol% for x ≤ 0.07 and of 387 kOe/mol% for larger x. In addition, a linear correlation between 〈H_{B}〉 and the average isomer shift, 〈I_{B}〉, was revealed to hold. It indicates that addition of Ca-ions into the magnetite causes a decrease in the spin-density and an increase in the charge-density at Fe nuclei occupying the B-sites.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.