National Changhua University of Education Institutional Repository : Item 987654321/14172

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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/14172

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/14172

Title:	Magnetoresistance and Magnetothermopower of Nitrogen-annealed RE1.2Sr1.8Mn2O7+δ(RE = Nd, Pr)
Authors:	Sheu, C. S.;Huang, M. S.;Wu, T. W.;Liu, Chia-Jyi
Contributors:	物理學系
Keywords:	Layered manganites;Mangetotransport;Polaronic transport
Date:	2002-02
Issue Date:	2012-09-10T06:13:54Z
Publisher:	Elsevier
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.
Relation:	J. Magn. Magn. Mater., 239(1-3): 192-194
Appears in Collections:	[Department of Physics] Periodical Articles

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