Magnetoresistance and magnetothermopower of nitrogen-annealed RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr)

C. S. Sheu; M. S. Huang; T. W. Wu; C. J. Liu

doi:10.1016/S0304-8853(01)00552-2

Magnetoresistance and magnetothermopower of nitrogen-annealed RE_1.2Sr_1.8Mn₂O_7+δ (RE = Nd, Pr)

C. S. Sheu, M. S. Huang, T. W. Wu, C. J. Liu

Department of Physics

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

Abstract

We report measurements of resistance and thermopower of RE_1.2Sr_1.8Mn₂O_7+δ (RE = Nd, Pr) ceramics up to a magnetic field of 5 T. Nitrogen annealing has dramatic effects on the transport in reducing the resistivity, shifting peak resistivity to a higher temperature, and shifting thermopower to more negative values. The value of Δ_JT increases as a result of nitrogen annealing, indicating an enhanced Jahn-Teller distortion due to the increased Mn³⁺ concentration. These results are consistent with the effects of nitrogen annealing on the transport of RE = La.

Original language	English
Pages (from-to)	192-194
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	239
Issue number	1-3
DOIs	https://doi.org/10.1016/S0304-8853(01)00552-2
Publication status	Published - 2002 Feb 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/S0304-8853(01)00552-2

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title = "Magnetoresistance and magnetothermopower of nitrogen-annealed RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr)",

abstract = "We report measurements of resistance and thermopower of RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr) ceramics up to a magnetic field of 5 T. Nitrogen annealing has dramatic effects on the transport in reducing the resistivity, shifting peak resistivity to a higher temperature, and shifting thermopower to more negative values. The value of ΔJT increases as a result of nitrogen annealing, indicating an enhanced Jahn-Teller distortion due to the increased Mn3+ concentration. These results are consistent with the effects of nitrogen annealing on the transport of RE = La.",

author = "Sheu, {C. S.} and Huang, {M. S.} and Wu, {T. W.} and Liu, {C. J.}",

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T1 - Magnetoresistance and magnetothermopower of nitrogen-annealed RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr)

AU - Sheu, C. S.

AU - Huang, M. S.

AU - Wu, T. W.

AU - Liu, C. J.

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N2 - We report measurements of resistance and thermopower of RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr) ceramics up to a magnetic field of 5 T. Nitrogen annealing has dramatic effects on the transport in reducing the resistivity, shifting peak resistivity to a higher temperature, and shifting thermopower to more negative values. The value of ΔJT increases as a result of nitrogen annealing, indicating an enhanced Jahn-Teller distortion due to the increased Mn3+ concentration. These results are consistent with the effects of nitrogen annealing on the transport of RE = La.

AB - We report measurements of resistance and thermopower of RE1.2Sr1.8Mn2O7+δ (RE = Nd, Pr) ceramics up to a magnetic field of 5 T. Nitrogen annealing has dramatic effects on the transport in reducing the resistivity, shifting peak resistivity to a higher temperature, and shifting thermopower to more negative values. The value of ΔJT increases as a result of nitrogen annealing, indicating an enhanced Jahn-Teller distortion due to the increased Mn3+ concentration. These results are consistent with the effects of nitrogen annealing on the transport of RE = La.

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