EPR and optical study of Mn2+ doped ammonium tartrate single crystals

Kripal, Ram; Govind, Har; Bajpai, Manisha; Maurya, Manju

doi:10.1016/j.saa.2008.04.006

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…The difference between these two spectra is detailed as follows [27]. In Figure 3a, the spectrum is split in six lines due to the hyperfine interaction with the 55 Mn nucleus [27,28,29,30,31,32]. In Figure 3b the spectrum shows only one broad signal, this response is related with the dipole–dipole interaction induced by the dopant concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, at lower symmetries of Mn 4+ the fine structure is split in levels corresponding to 3/2–1/2, 1/2–−1/2 and −1/2–−3/2. However, as a result of large anisotropy only a central signal with its six hyperfine components due to Mn 2+ was observed and this signal can be overlapped by the response of Mn 4+ , being more sensitive for Mn 2+ [27,28,29,30,31,32,33,34,35]. …”

Section: Resultsmentioning

confidence: 99%

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Optical and Piezoelectric Study of KNN Solid Solutions Co-Doped with La-Mn and Eu-Fe

et al. 2016

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The solid-state method was used to synthesize single phase potassium-sodium niobate (KNN) co-doped with the La3+–Mn4+ and Eu3+–Fe3+ ion pairs. Structural determination of all studied solid solutions was accomplished by XRD and Rietveld refinement method. Electron paramagnetic resonance (EPR) studies were performed to determine the oxidation state of paramagnetic centers. Optical spectroscopy measurements, excitation, emission and decay lifetime were carried out for each solid solution. The present study reveals that doping KNN with La3+–Mn4+ and Eu3+–Fe3+ at concentrations of 0.5 mol % and 1 mol %, respectively, improves the ferroelectric and piezoelectric behavior and induce the generation of optical properties in the material for potential applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optical and Piezoelectric Study of KNN Solid Solutions Co-Doped with La-Mn and Eu-Fe

et al. 2016

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“…EPR of Mn 2+ impurity has been widely studied in variety of single crystals [1][2][3][4][5][6][7][8][9] due to sensitivity of its spin-spin dipolar splitting values to small structural distortions in the lattice [10,11] and high numbers of studies were reported on impurities doped into diamagnetic host lattices under normal atmospheric conditions and room temperatures, e.g. see [12][13][14][15]9].…”

Section: Introductionmentioning

confidence: 99%