Study of the microstructure and normal-state transport properties in the Bi1.9Sr1.6La0.4CuOy system

Xu Gaojie; Mao Zhiqiang; Tian Mingliang; Zhang Yuheng

doi:10.1016/s0921-4534(96)00568-0

Study of the microstructure and normal-state transport properties in the Bi_1.9Sr_1.6La_0.4CuO_y system

Xu Gaojie, Mao Zhiqiang, Tian Mingliang, Zhang Yuheng

Research output: Contribution to journal › Article › peer-review

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Abstract

The samples of Bi_1.9Sr_1.6La_0.4CuO_y with different oxygen concentrations are obtained by annealing the sintered sample in different conditions. The analysis of lattice parameters shows that the removal of oxygen from the system results in an orthorhombic-tetragonal transition. The analysis of the electron diffraction patterns revealed that the incommensurate modulation structure is independent of the oxygen content, which is in disagreement with the extra oxygen model. In the resistivity measurement, an anomalous deviation of resistivity downward from T-linearity at 180 K is detected, and a corresponding anomaly in thermoelectric power (TEP) is also found, which suggests that a spin gap exists in the Bi-2201 system. The comparison of microstructural characteristics for different samples demonstrates that the structural factor has crucial influence on the spin excitation spectrum.

Original language	English (US)
Pages (from-to)	251-255
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	271
Issue number	3-4
DOIs	https://doi.org/10.1016/s0921-4534(96)00568-0
State	Published - Nov 10 1996

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/s0921-4534(96)00568-0

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title = "Study of the microstructure and normal-state transport properties in the Bi1.9Sr1.6La0.4CuOy system",

abstract = "The samples of Bi1.9Sr1.6La0.4CuOy with different oxygen concentrations are obtained by annealing the sintered sample in different conditions. The analysis of lattice parameters shows that the removal of oxygen from the system results in an orthorhombic-tetragonal transition. The analysis of the electron diffraction patterns revealed that the incommensurate modulation structure is independent of the oxygen content, which is in disagreement with the extra oxygen model. In the resistivity measurement, an anomalous deviation of resistivity downward from T-linearity at 180 K is detected, and a corresponding anomaly in thermoelectric power (TEP) is also found, which suggests that a spin gap exists in the Bi-2201 system. The comparison of microstructural characteristics for different samples demonstrates that the structural factor has crucial influence on the spin excitation spectrum.",

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AU - Gaojie, Xu

AU - Zhiqiang, Mao

AU - Mingliang, Tian

AU - Yuheng, Zhang

PY - 1996/11/10

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N2 - The samples of Bi1.9Sr1.6La0.4CuOy with different oxygen concentrations are obtained by annealing the sintered sample in different conditions. The analysis of lattice parameters shows that the removal of oxygen from the system results in an orthorhombic-tetragonal transition. The analysis of the electron diffraction patterns revealed that the incommensurate modulation structure is independent of the oxygen content, which is in disagreement with the extra oxygen model. In the resistivity measurement, an anomalous deviation of resistivity downward from T-linearity at 180 K is detected, and a corresponding anomaly in thermoelectric power (TEP) is also found, which suggests that a spin gap exists in the Bi-2201 system. The comparison of microstructural characteristics for different samples demonstrates that the structural factor has crucial influence on the spin excitation spectrum.

AB - The samples of Bi1.9Sr1.6La0.4CuOy with different oxygen concentrations are obtained by annealing the sintered sample in different conditions. The analysis of lattice parameters shows that the removal of oxygen from the system results in an orthorhombic-tetragonal transition. The analysis of the electron diffraction patterns revealed that the incommensurate modulation structure is independent of the oxygen content, which is in disagreement with the extra oxygen model. In the resistivity measurement, an anomalous deviation of resistivity downward from T-linearity at 180 K is detected, and a corresponding anomaly in thermoelectric power (TEP) is also found, which suggests that a spin gap exists in the Bi-2201 system. The comparison of microstructural characteristics for different samples demonstrates that the structural factor has crucial influence on the spin excitation spectrum.

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Study of the microstructure and normal-state transport properties in the Bi_1.9Sr_1.6La_0.4CuO_y system

Abstract

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