Ordering and magnetic hyperfine fields in Pt3Mn0.9Fe0.1studied by Mossbauer spectroscopy

1991 ◽  
Vol 3 (29) ◽  
pp. 5469-5478 ◽  
Author(s):  
K Szymanski ◽  
L Dobrzynski ◽  
E Gerkema ◽  
A M van der Kraan
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Magnetic Hyperfine ◽  
Hyperfine Fields ◽  
Mößbauer Spectroscopy

Measurement of Extreme Hyperfine Fields in Two-Coordinate High-Spin Fe2+Complexes by Mössbauer Spectroscopy: Essentially Free-Ion Magnetism in the Solid State

2014 ◽  
Vol 53 (22) ◽  
pp. 12100-12107 ◽  
Author(s):  
Aimee M. Bryan ◽  
Chun-Yi Lin ◽  
Michio Sorai ◽  
Yuji Miyazaki ◽  
Helen M. Hoyt ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Solid State ◽  
High Spin ◽  
Mossbauer Spectroscopy ◽  
Hyperfine Fields ◽  
Mößbauer Spectroscopy ◽  
Free Ion

Mössbauer spectra of α- and γ-polymorphs of FeOOH and Fe2O3 : effects of poor crystallinity and of Al-for-Fe substitution

Clay Minerals ◽  
2002 ◽  
Vol 37 (4) ◽  
pp. 591-606 ◽  
Author(s):  
E. De Grave ◽  
C. A. Barrero ◽  
G. M. Da Costa ◽  
R. E. Vandenberghe ◽  
E. Van San
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mössbauer Spectra ◽  
Mossbauer Spectroscopy ◽  
Precise Determination ◽  
Zero Field ◽  
Hyperfine Fields ◽  
Morin Transition ◽  
Mossbauer Spectra ◽  
Al Content ◽  
Mößbauer Spectroscopy

AbstractThis paper presents various aspects, revealed by Mössbauer spectroscopy, of structural and magnetic properties of Al-substituted small-particle soil-related oxides. For goethite we focus on the relations between the hyperfine fields on the one hand, and crystallinity and Al content on the other. It is argued that these relations only provide a rough estimate of the Al content in natural samples. The ferrimagnetic-like behaviour reflected in the external-field Mössbauer spectra (4.2 K, 60 kOe) of certain Al goethites is presented. The spectra obtained for lepidocrocites are not spectacular, but confirmed that up to ∼10 at.% Al can be incorporated in the structure. Three differently-made series of hematites are considered. The Morin transition and spin structures in hematite are very sensitive to crystallinity and Al content, and probably to the presence of structural OH–. Integral low-energy electron Mössbauer spectroscopy on non-substituted samples indicates that the Morin-transition temperature in the surface layers (2 to 5 nm) is not significantly shifted from the bulk value. Measurements in extremely high magnetic fields (140 kOe) have shown that a spin-flip transition is induced in highly-substituted samples which exhibit no Morin transition in zero field. The use of external fields is crucial for the characterization and precise determination of the hyperfine parameters and site occupancies for maghemites, and for phase analyses of magnetic soils.

scholarly journals 57Fe Mössbauer Spectroscopy as a Tool for Study of Spin States and Magnetic Interactions in Inorganic Chemistry

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1062
Author(s):  
Ernő Kuzmann ◽  
Zoltán Homonnay ◽  
Zoltán Klencsár ◽  
Roland Szalay
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
57Fe Mössbauer Spectroscopy ◽  
Magnetic Interactions ◽  
Hyperfine Fields ◽  
Coordination Environment ◽  
57Fe Mössbauer ◽  
57Fe Mossbauer Spectroscopy ◽  
Mößbauer Spectroscopy ◽  
Very High

In this mini-review of our research group’s activity, the application of 57Fe Mössbauer spectroscopy in studies of electronic structure, coordination environment, and magnetic interactions in an interesting series of Fe(II/III) compounds selected is discussed. We selected two prominent phenomena that arose during investigations of selected groups of compounds carried out at different periods of time: (1) very high magnetic hyperfine fields observed at low temperatures; (2) changes in the oxidation state of the central iron atom of complexes in the solid state during interactions with gaseous O2/H2O mixtures, resulting in spin crossover (SCO).

scholarly journals Spin relaxation in antiferromagnetic Fe–Fe dimers slowed down by anisotropic DyIII ions

2013 ◽  
Vol 4 ◽  
pp. 807-814 ◽  
Author(s):  
Valeriu Mereacre ◽  
Frederik Klöwer ◽  
Yanhua Lan ◽  
Rodolphe Clérac ◽  
Juliusz A Wolny ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Magnetic Anisotropy ◽  
Hyperfine Field ◽  
Crystal Field ◽  
Spin Relaxation ◽  
Mossbauer Spectroscopy ◽  
Molecular Clusters ◽  
Hyperfine Fields ◽  
Mößbauer Spectroscopy

By using Mössbauer spectroscopy in combination with susceptibility measurements it was possible to identify the supertransferred hyperfine field through the oxygen bridges between DyIII and FeIII in a {Fe4Dy2} coordination cluster. The presence of the dysprosium ions provides enough magnetic anisotropy to “block” the hyperfine field that is experienced by the iron nuclei. This has resulted in magnetic spectra with internal hyperfine fields of the iron nuclei of about 23 T. The set of data permitted us to conclude that the direction of the anisotropy in lanthanide nanosize molecular clusters is associated with the single ion and crystal field contributions and 57Fe Mössbauer spectroscopy may be informative with regard to the the anisotropy not only of the studied isotope, but also of elements interacting with this isotope.

Magnetic hyperfine field splitting in the Zintl phase Eu2Mg4Si3

2019 ◽  
Vol 74 (5) ◽  
pp. 451-454 ◽  
Author(s):  
Theresa Block ◽  
Ryosuke Numakura ◽  
Masashi Kosaka ◽  
Shinji Michimura ◽  
Rainer Pöttgen
Keyword(s):  
Mössbauer Spectroscopy ◽  
Hyperfine Field ◽  
Mossbauer Spectroscopy ◽  
Magnetic Hyperfine Field ◽  
Type Structure ◽  
Magnetic Hyperfine ◽  
Hyperfine Fields ◽  
Zintl Phase ◽  
Field Splitting ◽  
Divalent State

AbstractEu2Mg4Si3 ≡ (2Eu2+)(4Mg2+)(3Si4−) is an electron-precise Zintl phase. Its Hf2Co4P3-type structure contains three crystallographically independent europium sites. The divalent state of europium was manifested through 151Eu Mössbauer spectroscopy. In the paramagnetic regime (T = 78 K) the isomer shifts range from −9.16 to −11.29 mm s−1. Eu2Mg4Si3 shows complex magnetic hyperfine field splitting at T = 5.7 K with a superposition of three subspectra with magnetic hyperfine fields of 5.4 (Eu2), 20.4 (Eu1) and 22.4 (Eu3) T.

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