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- W2033089927 abstract "We report measurements of the electrical resistivity, the Seebeck-coefficient and the magnetic susceptibility of samples (La1−xSrx)2NiO4+δ in the concentration range 0 ≤ χ ≤ 0.5. All compounds exhibit semiconducting behaviour at low temperatures with thermally activated or variable range hopping type of conductivity. The comparison of the temperature dependence of the conductivity and the Seebeck-coefficient reveals the polaron character of the charge carriers. From the susceptibility measurements at high temperatures we derive an exchange interaction Jaf≈ 140 K for the NiO2-planes in La2NiO4. We develop a magnetic phase diagram for (La1−xSrx)2NiO4 with an antiferromagnetic range for x≤0.04 and a spin glass range for x > 0.04. The results are discussed in comparison with those of the high temperature superconducting system (La1−xSrx)2CuO4." @default.
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- W2033089927 date "1991-11-01" @default.
- W2033089927 modified "2023-09-29" @default.
- W2033089927 title "Electronic charge transport and magnetism of the system (La1−xSrx)2NiO4+δ" @default.
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- W2033089927 doi "https://doi.org/10.1016/0921-4534(91)90758-q" @default.
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