Solid state reactions and some physical properties of reduced europium niobates Eu{sub x}NbO{sub y} (0.5 {le}x{le}2)

Conference · Tue Dec 31 00:00:00 EST 1996

OSTI ID:518591

Nakamura, A; Masaki, N M; Nakada, M ^[1]

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1. Japan Atomic Energy Research Institute, Ibaraki (Japan); and others

A series of new perovskite-type reduced europium niobates Eu{sub x}NbO{sub Y} (0.5{le}x{le}0) were prepared by conventional methods. Their formation process. structural and physical properties were studied by means of {sup 151}Eu Moessbauer spectroscopy, powder XRD and EPMA methods, electrical conductivity and magnetic susceptibility measurements. etc. Several unique features of these systems were found: a much higher reduction rate of Eu{sup 3+} to Eu{sup 2+} by Nb oxides (NbO, Nb{sub 2}O{sub 3}, NbO{sub 2}) than that by Nb metal; extremely large isomer shifts for Eu{sup 3+}; and spin glass-like behavior at temperatures below 6K.

• OSTI ID: 518591
• Report Number(s): CONF-960367-; TRN: 97:003394-0020
• Resource Relation: Conference: Workshop on mass and charge transport in ceramics, Nagoya (Japan), 15-16 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Ceramic transactions: Mass and charge transport in ceramics. Volume 71; Koumoto, Kunihito; Sheppard, L.M.; Matsubara, Hideaki [eds.]; PB: 643 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
EUROPIUM COMPOUNDS
PHYSICAL PROPERTIES
NIOBATES
MAGNETIC SUSCEPTIBILITY
PEROVSKITE
ELECTRIC CONDUCTIVITY
EUROPIUM 151
X-RAY DIFFRACTION
ISOMER SHIFT