EPR and magnetic susceptibility studies of iron ions in 70TeO2·25B2O3·5PbO glass matrix

Ardelean, I.; Peteanu, M.; Filip, S.; Simon, V.; Győrffy, Gábor

doi:10.1016/s0038-1098(96)00772-7

Cited by 72 publications

(44 citation statements)

References 17 publications

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“…From the graph the Curie constant (650 Â 10 À 3 emu mol À 1 ) and Curie temperature (108 K) have been evaluated. The Curie constant and Curie temperature evaluated in the present work are in the order expected for the paramagnetic ion [43].…”

Section: Optical Absorption Studiessupporting

confidence: 59%

EPR and optical absorption studies of Fe3+ ions in sodium borophosphate glasses

Muralidhara

Kesavulu

Rao

et al. 2010

Journal of Physics and Chemistry of Solids

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ions coupled by exchange interaction in a distorted octahedral environment. The EPR spectra at different temperatures (123-295 K) have also been studied. The intensity of the resonance signals decreases with increase in temperature whereas linewidth is found to be independent of temperature. The paramagnetic susceptibility (w) was calculated from the EPR data at various temperatures and the Curie constant (C) and paramagnetic Curie temperature (y p ) have been evaluated from the 1/w versus T graph. The optical absorption spectrum exhibits bands characteristic of Fe 3 + ions in octahedral symmetry. The crystal field parameter (Dq) and the Racah interelectronic repulsion parameters (B and C) have also been evaluated and discussed.

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Section: Optical Absorption Studiessupporting

confidence: 59%

EPR and optical absorption studies of Fe3+ ions in sodium borophosphate glasses

Muralidhara

Kesavulu

Rao

et al. 2010

Journal of Physics and Chemistry of Solids

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“…The perpendicular hyperfine structure in the high magnetic field region was not resolved. It was observed that high magnetic field region of the spectra was more intense than the low magnetic field region and supported by reported data for other TL glass systems [28][29][30][31]. An axial spinHamiltonian was employed in the analysis of EPR spectra [31,32], which is given as…”

Section: Resultsmentioning

confidence: 61%

Preparation of new thermoluminescent material (100−x)B2O3–xLi2O: Cu2+ for sensing and detection of radiation

et al. 2016

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The copper-doped lithium borate glass as a thermoluminescent (TL) material (100−x)B 2 O 3 -xLi 2 O : Cu 2+ (x = 20, 50 and 80 mol%) was prepared by the combustion method. The formation of (100−x)B 2 O 3 -xLi 2 O : Cu 2+ after doping 2, 3 and 5 ppm Cu 2+ , was characterized by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electron microscopy. The TL characteristics of the synthesized material were studied at different parameters. The synthesized glass 50B 2 O 3 -50i 2 O : Cu 2+ with 3 ppm of doped Cu 2+ , exhibited the superior TL properties than other glasses prepared in the current study. The spin-Hamiltonian parameters were assessed using the electron spin resonance spectra of 50B 2 O 3 -50Li 2 O : Cu 2+ doped with 3 ppm Cu 2+ . The spinHamiltonian parameter values in the case of Cu 2+ revealed that the ground state of Cu 2+ was dx 2 -y 2 orbital ( 2 B 1g ) and the site symmetry around Cu 2+ ion was distorted octahedral. TL glow curves were recorded with different heating rates (1, 2, 5, 10, 15, and 20 • C s −1 ) at the fixed dose 10 × 10 3 Gy. The results revealed that the glow peak position shifted to higher temperature with heating rate and the heating rate of 10 • C s −1 showed the superior TL response with highest glow peak which is very good for dosimetry purposes.

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“…The spectrum is given in Fig 2. The value nearly at g ≈ 4.2 ±0.1 is in general due to isolated Fe +3 ions located in sites of distorted octahedral symmetry, either rhombic or tetragonal from strong crystal field effects and g ≈ 2 was attributed to Fe +3 ion interactions by dipole-dipole interaction in a site of less distorted octahedral field [13][14][15].The g values, g = 4.143 and g = 2.030 in low magnetic and high magnetic fields obtained for Fe(III) doped Ni LHICL crystal can also be interpreted on the same lines.…”

Section: Epr Studiesmentioning

confidence: 95%

Growth, Characterization and NLO activity of Fe (III) doped Ni L-Histidine Hydrochloride Monohydrate Crystals

Parvathi¹

2014

IOSRJEN

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Fe(III) ion doped Ni L-Histidine Hydrochloride monohydrate crystals (Fe(III)-NiLHICL) are grown at room temperature using slow evaporation technique. The Fe(III) doped NiLHICL crystals are characterized by spectroscopic techniques such as X-Ray diffraction studies, Electron Paramagnetic Resonance(EPR), Optical Absorption and FTIR studies. Thermal stabilities were studied by TGA/DTA analysis. The powder diffraction patterns of prepared crystals have been recorded and lattice cell parameters are evaluated as a = 1.5286, b = 0.8933, c = 0.6852 nm. From EPR studies, g and hyperfine splitting parameters for Fe(III) ion in the host crystals are determined as g = 2.0301 indicating octahedral symmetry. Crystal field and inter-electronic parameters are evaluated from the optical absorption studies in addition to obtaining the confirmation for octahedral symmetry for the ions in the host lattice. The FT-IR spectrum exhibited characteristic vibrations of the groups present in the crystal indicating bond formation between the metal ion and the amino acid.

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EPR and magnetic susceptibility studies of iron ions in 70TeO2·25B2O3·5PbO glass matrix

Cited by 72 publications

References 17 publications

EPR and optical absorption studies of Fe3+ ions in sodium borophosphate glasses

EPR and optical absorption studies of Fe3+ ions in sodium borophosphate glasses

Preparation of new thermoluminescent material (100−x)B2O3–xLi2O: Cu2+ for sensing and detection of radiation

Growth, Characterization and NLO activity of Fe (III) doped Ni L-Histidine Hydrochloride Monohydrate Crystals

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