Electron paramagnetic resonance and phase transition in (NH4)2SeO4:Mn2+single crystals

1979 ◽  
Vol 70 (11) ◽  
pp. 5168-5173 ◽  
Author(s):  
Vimal Kumar Jain ◽  
Putcha Venkateswarlu
Keyword(s):  
Phase Transition ◽  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Electron Paramagnetic Resonance and DTA Investigation of Cr3+ in Tris(guanidinium) Hexafluoroaluminate Single Crystals

1998 ◽  
Vol 53 (5) ◽  
pp. 245-250
Author(s):  
T. Lakshmi Kasturi ◽  
V. G. Krishnan
Keyword(s):  
Phase Transition ◽  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Aluminum Salts ◽  
Zero Field Splitting Parameter ◽  
Splitting Parameter ◽  
Electron Paramagnetic

Abstract Electron Paramagnetic Resonance (EPR) studies of Cr 3+ in single crystals of tris(guanidinium) hexafluoroaluminate, [C(NH2)3]3 AlF6 , have been carried out in the X-band region. A temperature dependent study of the zero-field splitting parameter D in the range 77-398 K shows the presence of a phase transition, which is supported by Differential Thermal Analysis. In addition, 19F superhyperfine struc-ture has been observed in the 9.3% naturally abundant 53Cr isotope hyperfine structure. D shows a large decrease with increasing temperature. The phase transition brings about a chemical inequivalence in the two chemically equivalent but magnetically inequivalent room temperature (CrF6)3- species. Compar-ison is made with the alums AlCl3 • 6H20, as well as other guanidinium aluminum salts.

EPR of VO2+ in ZnTiF6 · 6H2O

1996 ◽  
Vol 51 (4) ◽  
pp. 245-248
Author(s):  
Geetha Jayaram ◽  
V. G. Krishnan
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Spin Hamiltonian ◽  
Paramagnetic Resonance ◽  
Tutton Salts ◽  
Bonding Parameters ◽  
Superhyperfine Structure ◽  
Vanadyl Ion ◽  
Electron Paramagnetic

Abstract Electron Paramagnetic Resonance (EPR) studies have been carried out on the vanadyl (VO2) ion doped in single crystals of ZnTiF6 • 6H2O. The spectra indicate the presence of one set of eight lines characteristic of only one occupation site. The V-O bond orientation is along one of the three Zn-H2O bond directions in the trigonally distorted [Zn(H2O)6] octahedra. This behaviour is unlike that reported for vanadyl ion substituting for the M(H2O)6 sites in the Tutton salts, alums and AlCl3 • 6H2O. The Spin-Hamiltonian and bonding parameters for the [VO(H2O)5] complex have been evaluated. The hyperfine linewidths are 0.8 mT at 300 K and 77 K. No proton superhyperfine structure was observed at both these temperatures.

Electron paramagnetic resonance of irradiated single crystals of KCl doped with KCN

1982 ◽  
Vol 46 (3) ◽  
pp. 374-384
Author(s):  
J.E.Rodas Duran ◽  
H Panepucci ◽  
Horacio A Farach ◽  
Charles P Poole
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic
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