Electron Paramagnetic Resonance of Tetravalent Manganese Ions at Tetragonal and Octahedral Sites in MgO

1969 ◽  
Vol 178 (2) ◽  
pp. 608-612 ◽  
Author(s):  
J. John Davies ◽  
Stephen R. P. Smith ◽  
John E. Wertz
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Octahedral Sites ◽  
Electron Paramagnetic

scholarly journals Monitoring of the Mechanism of Mn Ions Incorporation into Quantum Dots by Optical and EPR Spectroscopy

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 107
Author(s):  
Yuriy G. Galyametdinov ◽  
Dmitriy O. Sagdeev ◽  
Andrey A. Sukhanov ◽  
Violeta K. Voronkova ◽  
Radik R. Shamilov
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Magnetic Properties ◽  
Luminescent Properties ◽  
Manganese Concentration ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Synthesis Of Nanoparticles ◽  
Zinc Sulfide Nanoparticles ◽  
Optical And Magnetic Properties ◽  
Electron Paramagnetic

Synthesis of nanoparticles doped with various ions can significantly expand their functionality. The conditions of synthesis exert significant influence on the distribution nature of doped ions and therefore the physicochemical properties of nanoparticles. In this paper, a correlation between the conditions of synthesis of manganese-containing cadmium sulfide or zinc sulfide nanoparticles and their optical and magnetic properties is analyzed. Electron paramagnetic resonance was used to study the distribution of manganese ions in nanoparticles and the intensity of interaction between them depending on the conditions of synthesis of nanoparticles, the concentration of manganese, and the type of initial semiconductor. The increase of manganese concentration is shown to result in the formation of smaller CdS-based nanoparticles. Luminescent properties of nanoparticles were studied. The 580 nm peak, which is typical for manganese ions, becomes more distinguished with the increase of their concentration and the time of synthesis.

scholarly journals Electron paramagnetic resonance of manganese-doped strontium titanate

Cerâmica ◽  
2020 ◽  
Vol 66 (378) ◽  
pp. 126-129
Author(s):  
R. S. de Biasi ◽  
M. L. N. Grillo
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Exchange Interaction ◽  
Strontium Titanate ◽  
Relative Intensity ◽  
Theoretical Equation ◽  
Manganese Concentration ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic ◽  
Mn Concentrations

Abstract Electron paramagnetic resonance (EPR) spectra of manganese-doped strontium titanate were investigated for several Mn concentrations. The spectra of Mn2+ and Mn4+ ions were observed and attributed, respectively, to Mn ions occupying Sr2+ and Ti4+ sites. The relative intensity of the spectra suggested that the manganese ions occupy preferentially Ti4+ sites. The results showed that the EPR peak-to-peak linewidth of the Mn4+ spectrum increases with manganese concentration according to the theoretical equation DHpp=0.45+210.f.(1-f)80 (mT). This suggested that the exchange interaction between tetravalent manganese ions in strontium titanate has an approximate range of 0.96 nm, comparable to that of Gd3+ in the same compound.

Electron paramagnetic resonance study of non-exchangeable vanadium(IV) in rectorites

Clay Minerals ◽  
1990 ◽  
Vol 25 (3) ◽  
pp. 283-287 ◽  
Author(s):  
B. A. Goodman ◽  
P. H. Nadeau
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Experimental Evidence ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Study ◽  
Paramagnetic Resonance ◽  
Octahedral Sites ◽  
Two Samples ◽  
Electron Paramagnetic

AbstractEPR spectroscopy was used to provide evidence for the existence of vanadium(IV) in two samples of rectorite. Possible sites for the vanadium are the tetrahedral and octahedral sites in the 2:1 layers and the non-exchangeable interlayer sites in the paragonite part of the structure. Consideration is given to each of these possibilities but the experimental evidence is insufficient to identify conclusively the location of the vanadium. Since substantial amounts of vanadium(IV) were present in the only well-defined rectorite samples obtainable, it is possible that the formation of rectorite is facilitated by the presence of vanadium.

ELECTRON PARAMAGNETIC RESONANCE OF MANGANESE IN CESIUM AND AMMONIUM CHLORIDES

1967 ◽  
Vol 45 (10) ◽  
pp. 3381-3386 ◽  
Author(s):  
A. Forman ◽  
J. A. Van Wyk
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Fine Structure ◽  
Line Width ◽  
Structure Parameter ◽  
Manganese Ions ◽  
Spin Hamiltonian ◽  
Epr Spectrum ◽  
Paramagnetic Resonance ◽  
Hamiltonian Parameters ◽  
Electron Paramagnetic

The spin-Hamiltonian parameters describing the EPR spectrum of Mn2+ in CsCl crystals grown from solutilon have been determined. The line-width data are in agreement with the manganese ions being incorporated interstitially rather than substitutionally for Cs+ ions. From the work on Mn2+ in NH4Cl we infer that the fine structure parameter, D2, is negative.

Electron-paramagnetic-resonance spectra of manganese ions in synthetic zeolites

1969 ◽  
Vol 10 (3) ◽  
pp. 364-369
Author(s):  
L. G. Dzhashiashvili ◽  
N. N. Tikhomirova ◽  
G. V. Tsitsishvili
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Synthetic Zeolites ◽  
Electron Paramagnetic

scholarly journals Распределение ионов марганца Mn-=SUP=-2+-=/SUP=- в монокристалле литий-галлиевой шпинели Li-=SUB=-0.5-=/SUB=-Ga-=SUB=-2.5-=/SUB=-O-=SUB=-4-=/SUB=-

2021 ◽  
Vol 63 (4) ◽  
pp. 499
Author(s):  
V.V. Shapovalov ◽  
В.А. Шаповалов ◽  
В.Г. Шавров ◽  
В.В. Коледов ◽  
В.И. Вальков ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystal ◽  
Crystal Field ◽  
Field Potential ◽  
Unit Cell ◽  
Self Organization ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Self-organization of eight structurally and magnetically non-equivalent positions of manganese ions Mn2+ in a unit cell of single-crystal lithium-gallium spinel Li0,5Ga2,5O4 is demonstrated. The ions are self-distributed over these positions and the minima of the crystal field potential. Self-distribution of manganese ions becomes apparent in the spectra of Electron Paramagnetic Resonance (EPR).

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