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Dielectric, magnetic, and magnetotransport properties in Sr doped two-dimensional RE2CoO4 (RE=Pr,Eu) compounds

Journal Article


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Abstract


  • In this work, we report on the studies of dielectric, magnetic, and magnetotransport properties of Sr doped RE2-xSrxCoO4 (RE=Pr or Eu, x=0.25-1.5). These compounds were systematically studied in terms of structure, magnetic, magnetotransport, and dielectric constant measurements. Rietveld refinement indicated that these compounds crystallized in K2NiF4-type structure with space group I4/mmm. Lattice parameters increase with Sr doping level. The system changes from paramagnetic to ferromagnetic with increasing Sr doping level and finally becomes ferromagnetic with T-C of 230 K for Pr0.75Sr1.25CoO4 and EuSrCoO4, respectively. The temperature dependence of resistivity indicates that both systems change from semiconductive to metallic with Sr doping. The magnetoresistance (MR) value of 10% at 5 K and 8 T is found for the EuSrCoO4 compound. Large dielectric constants with values of above 2000 were observed in low frequencies for samples with x around 1 for Pr based compounds.

Publication Date


  • 2008

Citation


  • Yao, Q., Wang, X. & Dou, S. Xue. (2008). Dielectric, magnetic, and magnetotransport properties in Sr doped two-dimensional RE2CoO4 (RE=Pr,Eu) compounds. In Conference on Magnetism and Magnetic Materials, NOV 05-09, 2007, Tampa, Florida, USA. Journal of Applied Physics, 103 (7), 1-7.

Scopus Eid


  • 2-s2.0-42149177724

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1257&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/258

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA

Abstract


  • In this work, we report on the studies of dielectric, magnetic, and magnetotransport properties of Sr doped RE2-xSrxCoO4 (RE=Pr or Eu, x=0.25-1.5). These compounds were systematically studied in terms of structure, magnetic, magnetotransport, and dielectric constant measurements. Rietveld refinement indicated that these compounds crystallized in K2NiF4-type structure with space group I4/mmm. Lattice parameters increase with Sr doping level. The system changes from paramagnetic to ferromagnetic with increasing Sr doping level and finally becomes ferromagnetic with T-C of 230 K for Pr0.75Sr1.25CoO4 and EuSrCoO4, respectively. The temperature dependence of resistivity indicates that both systems change from semiconductive to metallic with Sr doping. The magnetoresistance (MR) value of 10% at 5 K and 8 T is found for the EuSrCoO4 compound. Large dielectric constants with values of above 2000 were observed in low frequencies for samples with x around 1 for Pr based compounds.

Publication Date


  • 2008

Citation


  • Yao, Q., Wang, X. & Dou, S. Xue. (2008). Dielectric, magnetic, and magnetotransport properties in Sr doped two-dimensional RE2CoO4 (RE=Pr,Eu) compounds. In Conference on Magnetism and Magnetic Materials, NOV 05-09, 2007, Tampa, Florida, USA. Journal of Applied Physics, 103 (7), 1-7.

Scopus Eid


  • 2-s2.0-42149177724

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1257&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/258

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA