EPR Spectra of Some Cu2+-Doped Metal Carbonates and Disorder Phase Transition in K3H(CO3)(2)

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Demir D., Koksal F., Kazak C., Koseoglu R.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, vol.64, no.1-2, pp.123-126, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 64 Issue: 1-2
  • Publication Date: 2009
  • Doi Number: 10.1515/zna-2009-1-217
  • Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.123-126
  • Keywords: Electron Paramagnetic Resonance, Carbonates, Disorder Phase Transition, Cu2+ Doping, ELECTRON-PARAMAGNETIC-RESONANCE, SINGLE-CRYSTALS, CU2+ IONS, OPTICAL-ABSORPTION, KHCO3, ESR
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Cu2+-doped K3H(CO3)(2), Rb2CO3, and Rb2KH(CO3)(2) single crystals were investigated by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectrum of K3H(CO3)(2) indicates two different sites for Cu2+ at room and at low temperatures. But the signals for the two sites overlap at 318 K which is attributed to a disorder phase transition. Each of the other compounds exhibits one site. The Cu2+ ion seems to Substitute the K+ and Rb+ ions and the charge compensations are fullilled by the proton vacancies in K3H(CO3)(2), and another K+ and Rb+ in the other Compounds. The spin Hamiltonian parameters g and A for each Compound are determined and discussed.