NEW AXIAL FE3+ CENTERS IN STOICHIOMETRIC LITHIUM-NIOBATE CRYSTALS

Autor(en): MALOVICHKO, GI
GRACHEV, VG
SCHIRMER, OF
FAUST, B
Stichwörter: COMPUTER-SIMULATION; DEFECTS; DOPED LINBO3; FE-3+; IRON; LITAO3; Physics; Physics, Condensed Matter; RESONANCE; SITES
Erscheinungsdatum: 1993
Herausgeber: IOP PUBLISHING LTD
Journal: JOURNAL OF PHYSICS-CONDENSED MATTER
Volumen: 5
Ausgabe: 23
Startseite: 3971
Seitenende: 3976
Zusammenfassung: 
Two new axial Fe3+ centres, arising after reduction of stoichiometric lithium niobate crystals grown from melts containing K2O, were discovered and investigated by EPR. Their b2(0) crystal field parameters are equal to 495 and 688 (x 10(-4) cm- 1) and are thus much smaller than b2(0) for the axial Fe(Li)3+ centre, 1660 x 10(-4) cm-1, which had been studied before. The models Of Fe3+ centres in lithium niobate and lithium tantalate crystals are compared and the possible structures-Fe(Nb)3+ and Fe(Nb)3+-K(Li)-of the new centres are discussed.
ISSN: 09538984
DOI: 10.1088/0953-8984/5/23/024

Show full item record

Google ScholarTM

Check

Altmetric