Growth, structure, and properties of KTiOPO{sub 4} crystals doped with iron

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774506060071· OSTI ID:21091428

Leont'eva, I N ^[1]; Sorokina, N I ^[2]; Ovsetsina, T I ^[3]; Verin, I A ^[2]

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1. Moscow State University, Faculty of Physics (Russian Federation)
2. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
3. Nizhni Novgorod State University (Russian Federation)

A series of iron-doped KTiOPO{sub 4} (KTP: Fe) single crystals in which iron substitutes for 0.1-0.3% titanium was grown. The structure of the KTP: Fe crystals was determined, and their dielectric and conducting properties were studied. An X-ray diffraction analysis failed to reveal such a small amount of Fe{sup +3} ions in titanium octahedral positions of the structure. It was found that an increase in the iron concentration results in a lowering of the symmetry of Ti(1)O{sub 6} and Ti(2)O{sub 6} octahedra. The splitting of the dielectric anomaly due to the ferroelectric phase transition was explained by the mechanism of incorporation of an impurity into different growth pyramids of the crystals. It was established that the aging of the KTP: Fe crystals leads to changes in the permittivity and electrical conductivity during long storage.

• OSTI ID: 21091428
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 6 Vol. 51; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL GROWTH
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FERROELECTRIC MATERIALS
IMPURITIES
IRON
IRON IONS
MONOCRYSTALS
PERMITTIVITY
PHASE TRANSFORMATIONS
PHOSPHATES
POTASSIUM COMPOUNDS
TITANIUM COMPOUNDS
X-RAY DIFFRACTION