Magnetic, thermal, transport, and structural properties of Sr2RuO4+δ: Enhanced charge-carrier mass in a nearly metallic oxide
Creators
- 1. Sektion Physik an der Universitaet Muenchen, Schellingstrasse 4, 80799 Muenchen (Germany)
- 2. Condensed Matter and Thermal Physics, MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- 3. Superconductivity Technology Center, MS G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- 4. University of Missouri-Columbia, Research Reactor Facility, Columbia, Missouri 65211 (United States)
Description
Measurements of electrical resistivity, magnetic susceptibility, heat capacity, and powder neutron diffraction are presented on Sr2RuO4+δ. Specimens with low-impurity levels allow magnetic susceptibility in the range 5<T<350 K to be measured; these measurements indicate a small effective magnetic moment of μeff∼1μB per Ru ion. Electrical resistivity displays nonmetallic behavior in the range 1.2<T<300 K with ρ(295 K)=51 mΩ cm. A rather large linear heat-capacity coefficient of γ=45.6 mJ/mol K2 is reported; speculation is made regarding its origin. Rietveld refinement of powder-neutron-diffraction data provide insight into the physical properties and reveal interesting differences to isostructural La2CuO4. Comparisons are drawn to other transition-metal oxides
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 50
- Journal Issue
- 24
- Journal Page Range
- p. 17910-17916.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26032647
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANTIFERROMAGNETISM; ELECTRIC CONDUCTIVITY; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; NEUTRON DIFFRACTION; PHYSICAL PROPERTIES; RUTHENIUM OXIDES; SPECIFIC HEAT; STRONTIUM OXIDES; STRUCTURAL CHEMICAL ANALYSIS; SUBSTOICHIOMETRY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; ELECTRICAL PROPERTIES; MAGNETIC PROPERTIES; MAGNETISM; OXIDES; OXYGEN COMPOUNDS; RUTHENIUM COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS