The Formation of Dimeric Centers of Copper, Iron and Gadolinium in Modified Pb5Ge3O11

• Published in: Applied magnetic resonance Vol. 46; no. 1; pp. 49 - 58
• Main Authors: Vazhenin, V. A., Artyomov, M. Yu, Potapov, A. P., Vylkov, A. I.
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.01.2015; Springer Nature B.V
• Subjects: Annealing; Atoms and Molecules in Strong Fields; Bromine; Chlorine; Copper; Crystal defects; Dimers; Electron paramagnetic resonance; Fluorine; Gadolinium; Iron; Laser Matter Interaction; Organic Chemistry; Physical Chemistry; Physics; Physics and Astronomy; Single crystals; Solid State Physics; Spectra; Spectroscopy/Spectrometry; Temperature; CsBr; Lead Chloride; Dimeric Complex; Electron Paramagnetic Resonance; Electron Paramagnetic Resonance Spectrum
• ISSN: 0937-9347; 1613-7507
• DOI: 10.1007/s00723-014-0607-6

It is discovered that the electron paramagnetic resonance (EPR) spectrum of the doubly charged copper centers occurs in single crystals of Pb 5 Ge 3 O 11 doped with gadolinium or iron after annealing in an atmosphere containing chlorine and bromine. Similar annealing of the crystals doped with copper in a chlorine and fluorine atmosphere leads to redistribution of the intensities of the EPR spectra of two types of Cu 2+ centers. The influence of annealing on the ongoing intensity of spectra of the dimeric triclinic centers Fe 3+ –A, Gd 3+ –A (where A represent Cl − , Br − , O 2− , F − ) was the subject of this research. Consideration is given to the mechanisms for changing the charge state and association of copper center with defects.