Motion of the magnetic moments detected by means of Mössbauer spectroscopy in magnetic systems

1968 ◽  
Vol 57 (2) ◽  
pp. 531-533 ◽  
Author(s):  
G. Asti ◽  
G. Albanese ◽  
C. Bucci
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Magnetic Moments ◽  
Magnetic Systems ◽  
Mößbauer Spectroscopy

scholarly journals Mössbauer Spectroscopy of Triphylite (LiFePO4) at Low Temperatures

2019 ◽  
Vol 4 (4) ◽  
pp. 86
Author(s):  
Tomáš Kmječ ◽  
Jaroslav Kohout ◽  
Milan Dopita ◽  
Miroslav Veverka ◽  
Jan Kuriplach
Keyword(s):  
Mössbauer Spectroscopy ◽  
First Principles ◽  
Mossbauer Spectroscopy ◽  
Magnetic Measurements ◽  
Magnetic Moments ◽  
Magnetic Hyperfine Field ◽  
Antiferromagnetic Order ◽  
First Principles Calculations ◽  
Easy Magnetization ◽  
Mößbauer Spectroscopy

Low temperature magnetic ordering in the LiFePO 4 compound is investigated experimentally using Mössbauer spectroscopy and theoretically via first principles calculations. The evaluation of experiment carried out on a powder sample is compatible with an antiferromagnetic order of Fe ion magnetic moments. When an external magnetic field is applied, Fe magnetic moments start to deviate slightly from the [010] easy magnetization direction. These findings are confirmed by means of first principles calculations, which also suggest the magnitude of single ion magnetic anisotropy and orbital and spin-dipolar contributions to the magnetic hyperfine field, which is eventually in a good agreement with the experiment. Diffraction and magnetic measurements complement the study.

scholarly journals Identification of Mackinawite and Constraints on Its Electronic Configuration Using Mössbauer Spectroscopy

Minerals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1090
Author(s):  
Christian Schröder ◽  
Moli Wan ◽  
Ian B. Butler ◽  
Alastair Tait ◽  
Stefan Peiffer ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Magnetic Moments ◽  
Hyperfine Magnetic Field ◽  
Electronic Configuration ◽  
Spin Fluctuations ◽  
Natural Environments ◽  
Mössbauer Study ◽  
X Ray ◽  
Mößbauer Spectroscopy

The Fe(II) monosulfide mineral mackinawite (FeS) is an important phase in low-temperature iron and sulfur cycles, yet it is challenging to characterize since it often occurs in X-ray amorphous or nanoparticulate forms and is extremely sensitive to oxidation. Moreover, the electronic configuration of iron in mackinawite is still under debate. Mössbauer spectroscopy has the potential to distinguish mackinawite from other FeS phases and provide clarity on the electronic configuration, but conflicting results have been reported. We therefore conducted a Mössbauer study at 5 K of five samples of mackinawite synthesized through different pathways. Samples show two different Mössbauer patterns: a singlet that remains unsplit at all temperatures studied, and a sextet with a hyperfine magnetic field of 27(1) T at 5 K, or both. Our results suggest that the singlet corresponds to stoichiometric mackinawite (FeS), while the sextet corresponds to mackinawite with excess S (FeS1+x). Both phases show center shifts near 0.5 mm/s at 5 K. Coupled with observations from the literature, our data support non-zero magnetic moments on iron atoms in both phases, with strong itinerant spin fluctuations in stoichiometric FeS. Our results provide a clear approach for the identification of mackinawite in both laboratory and natural environments.

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