EPR Study of VO^{2+} Center in Fast Proton Conductor K_3H(SO_4)_2

• Authors: A. Ostrowski , S. Waplak , W. Bednarski
• Languages of publication: EN

Abstracts

EN

The pretransitional phenomena of superprotonic phase transition (T_{sp}=471 K) were studied in detail by X-band continuous wave EPR spectra of K_3H(SO_4)_2 crystal doped with VO^{2+} ions. Three kinds of VO^{2+} complexes (magnetically equivalent but structurally non-equivalent) denoted as VO^{2+}(I), VO^{2+}(II), and VO^{2+}(III) were found. "Smearing out" of the superhyperfine structure was observed as a result of interbond proton motion. VO^{2+} impurity replaces K^+ ion and experiences the same average crystal field gradient at T_{sp}=471 K for I- and II-type complexes. The increase in interbond proton frequency hopping above 360 K is a reason of significant line broadening.

Keywords

EN

61.50.-f; 76.30.-v

Discipline

• 61.50.-f: Structure of bulk crystals
• 76.30.-v: Electron paramagnetic resonance and relaxation(see also 33.35.+r Electron resonance and relaxation in atomic and molecular physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 1
• Pages: 127-135

Dates

published

2005-07

received

2005-04-24

Contributors

author

A. Ostrowski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

S. Waplak

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

W. Bednarski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.108.127