Unusual thermoelectric power of single-crystal La{1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}.

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.58.R579· OSTI ID:942386

Zhou, J -S; Goodenough, J B; Mitchell, J F

Anisotropic resistivity and thermoelectric power of a single crystal of the mixed-valent, bilayered perovskite La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} have been measured under hydrostatic pressure P < {approx}14 kbar. The transport properties measured parallel to an a-b plane can be interpreted with a model of two-manganese Zener polarons, that, on cooling to T{sub C}, progressively condense out into clusters, but are released to form a polaron liquid below a T{sub 0} < {approx} T{sub C}. Conduction along the c axis can be described by conventional small-polaron transport that is unaltered by clustering in the basal planes.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: ER
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 942386
• Report Number(s): ANL/MSD/JA-30862; TRN: US200915%%523
• Journal Information: Phys. Rev. B, Vol. 58, Issue 2 ; Jul. 1, 1998; ISSN 1098-0121
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COOLING
HYDROSTATICS
LANTHANUM OXIDES
LIQUIDS
MANGANESE OXIDES
MONOCRYSTALS
PEROVSKITE
POLARONS
POWER
PRESSURE DEPENDENCE
TRANSPORT
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE