Neutron diffraction and /sup 170/Yb Moessbauer investigation of the perovskite ytterbium titanium oxide

Journal Article · Mon Sep 02 00:00:00 EDT 1985 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(85)90324-X· OSTI ID:5105883

Greedan, J E; Soderholm, L; Friedt, J M

A phase with the perovskite structure (Pbnm) and a composition YbTiO/sub 2.95/ has been prepared by a high-temperature carbothermic method. Neutron diffraction shows a colinear ferrimagnetic structure at 7 K with Yb and Ti moments antiparallel along the c-axis of the orthorhombic cell and a Yb moment of 1.8(3) ..mu../sub B/. /sup 170/Yb Moessbauer measurements find a more precise and accurate value of 2.0(1)..mu../sub B/ from the maximum hyperfine field. From the temperature dependence of the hyperfine field a T/sub c/ = 42(1) K is found. The Yb sublattice magnetization below T/sub c/ follows a Brillouin function. At low temperature a distribution of hyperfine fields is observed which is attributed to a random distribution of defects surrounding the Yb sites. The magnetic structure is discussed in relation to possible values of the crystal field parameters, especially B/sub 0//sup 2/. 24 references, 4 figures, 3 tables.

• Research Organization: McMaster Univ., Hamilton, Ontario
• OSTI ID: 5105883
• Journal Information: J. Solid State Chem.; (United States), Vol. 59:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM OXIDES
CRYSTAL STRUCTURE
MAGNETIC SUSCEPTIBILITY
YTTERBIUM 170
MOESSBAUER EFFECT
YTTERBIUM OXIDES
CURIE POINT
EXPERIMENTAL DATA
FERRIMAGNETIC MATERIALS
MOESSBAUER SPECTROMETERS
NEUTRON DIFFRACTION
ORTHORHOMBIC LATTICES
SPACE GROUPS
TEMPERATURE DEPENDENCE
VERY LOW TEMPERATURE
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
DATA
DIFFRACTION
EVEN-EVEN NUCLEI
GAMMA SPECTROMETERS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MEASURING INSTRUMENTS
NUCLEI
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCATTERING
SPECTROMETERS
STABLE ISOTOPES
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTERBIUM COMPOUNDS
YTTERBIUM ISOTOPES
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies