EPR Study of Cu^{2+} Doped Fast-Proton Conductor K_3H(SO_4)_2 in the Temperature Range 100-450 K

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

Abstracts

EN

The K_3H(SO_4)_2 doped with Cu^{2+} ion was studied in detail by X-band CW EPR. Two kinds of Cu^{2+} complexes (magnetically and structurally nonequivalent) denoted as Cu^{2+}(I) and Cu^{2+}(II) were found. Spin-Hamiltonian parameters, direction cosines, and coordination of Cu^{2+} ion were determined at room temperature. The superhyperfine structure was observed below 250 K as a result of interacting of Cu^{2+} ion with four equivalent protons (I=1/2). Temperature studies of K_3H(SO_4)_2 crystal show that interbond motion as a precursor of superprotonic phase transition occurs at above≈250 K.

Keywords

EN

61.50.-f   76.30.-v  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2003
• Volume: 104
• Issue: 6
• Pages: 549-558

Dates

published

2003-12

received

2003-07-31

revised

2003-10-14

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Identifiers

DOI

10.12693/APhysPolA.104.549