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- W1820007921 abstract "The Seebeck- effect and the thermal diffusivity k of epitaxial layers of La 0.57 Ca 0.33 MnO 3-δ and bulk samples of Nd 0.67 Sr 0.33 MnO 3-δ were investigated in the temperature range 35K < T < 300K using the time resolved thermoelectric power (flash) method. In the temperature regime of the high magnetoresistance (GMR) which is close to the maximum resistivity p max of the La-Ca compound, we find a sign change of S(T) and a step in heat conductivity which we attribute to a temperature - induced metal-insulator transition at about 80K. For Nd 0.67 Sr 0.33 MnO 3-δ such a transition is also observed, but around 160K; here S(T) is always positive except for a gradual sign change at 370 K and the changes in κ are also more gradual. For temperatures above Ρ max we find evidence of a spin glass like state in both cases." @default.
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- W1820007921 date "1997-03-01" @default.
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- W1820007921 title "Thermal Properties of Some RE1-xEAxMnO3 Compounds" @default.
- W1820007921 doi "https://doi.org/10.1051/jp4:19971262" @default.
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