Localized level hopping transport in La(Sr)CrO/sub 3/

Journal Article · Sat Sep 15 00:00:00 EDT 1979 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.20.2255· OSTI ID:5879961

Karim, D P; Aldred, A T

High-temperature measurements have been performed on the electronically conducting oxide system La/sub 1-x/Sr/sub x/CrO/sub 3/ (0< or =x< or =0.4). The electrical conductivity displayed thermally activated temperature dependence between 300 and 1900 K with activation energies that varied between 0.11 and 0.19 eV. Seebeck coefficients measured over a similar temperature range showed little temperature dependence, an indication that the carrier mobility, rather than the carrier concentration, is thermally activated. The magnetic susceptibility was Curie-Weiss-like between 600 and 1100 K with an effective moment that decreased with an increase in strontium concentration. These results are shown to be consistent with transport by the adiabatic hopping of small polarons.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5879961
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Vol. 20:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM COMPOUNDS
CARRIER MOBILITY
ELECTRIC CONDUCTIVITY
MAGNETIC MOMENTS
MAGNETIC SUSCEPTIBILITY
SEEBECK EFFECT
STRONTIUM COMPOUNDS
CHROMATES
HIGH TEMPERATURE
POLARONS
REFRACTORIES
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
CHROMIUM COMPOUNDS
ELECTRICAL PROPERTIES
MAGNETIC PROPERTIES
MOBILITY
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUASI PARTICLES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
&amp; Refractories- Physical Properties