Title: EPR and dielectric spectroscopy of reorienting Cr³⁺-Li⁺ pair centres in Li₂Ge₇O₁₅crystal
Author(s):

	M.D.Volnianskii (Department of the solid state physics, Dnipropetrovsk National University, vul. Naukova 13, Dnipropetrovsk 49050, Ukraine.) ,
	M.P.Trubitsyn (Department of the solid state physics, Dnipropetrovsk National University, vul. Naukova 13, Dnipropetrovsk 49050, Ukraine.) ,
	Yahia A.H. Obaidat (Department of the solid state physics, Dnipropetrovsk National University, vul. Naukova 13, Dnipropetrovsk 49050, Ukraine.)

Earlier it has been shown that in the lithium heptagermanate Li₂Ge₇O₁₅ structure the chromium doping ions substitute the germanium hosts and create Cr³⁺-Li⁺ pair centres. In the paper EPR and dielectric spectra of Li₂Ge₇O₁₅:Cr³⁺ crystal are studied in the temperature range $300\div 500$ K. The thermally activated reorientation of Cr³⁺-Li⁺ pairs has been detected through EPR line width broadening and dielectric relaxation. Key words: impurity ions, electron paramagnetic resonance, dielectric loss and relaxation

Key words: impurity ions, electron paramagnetic resonance, dielectric loss and relaxation
PACS: 76.30.Da, 76.30.-v, 77.22.Gm