Insulator to Metal Transitions in Nd_<0.7>(Sr_<0.3-y>Ca_y)MnO_3

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概要

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• We have measured the temperature dependent resistivity of Nd_<0.7>(Sr_<0.3-y>Ca_y)MnO_3 in the magnetic field up to 8 tesla, with y=0 to 0.3 to investigate the stressrelated insulator to metal (I-M) transitions. For samples with x=0 and 0.1, the I-M transition occurs near the Curie temperature T_c, while for y=0.2, the I-M transition temperature is much lower than T_c. No I-M transition is observed for y=0.25 and 0.3, though there exists T_c in these two samples. Our results of the size-effect and the field dependency of the I-M transition can be explained by a combined action of the spin-dependent potential fluctuation and the magnetic interaction of the conduction electron with the localized spins.

• 社団法人日本磁気学会の論文
• 1999-01-20

著者

• Wu C.

  Department Of Physics And Materials Science City University Of Hong Kong

• WANG Y.

  Texas Center for Superconductivity, University of Houston

• Liu R

  Irc In Superconductivity:materials Research Laboratories Industrial Technology Research Institute:de

• Liu R.

  Department Of Chemistry National Taiwan University

• Wang Y.

  Texas Center For Superconductivity University Of Houston

• Huang C.

  Institute Of Materials Science And Engineering National Taiwan University

• Huang C

  Center For Condensed Matter Sciences National Taiwan University

• Huang C.

  Center For Condensed Matter Sciences

• Wu C.

  Department Of Materials Engineering National Chung Hsing University

• Lin J.

  Center for Condensed Matter Sciences

• Kan W.

  Texas Center for superconductivity at University of Housoton

• Wu C.

  Department Of Chemistry National Taiwan University

• Wu C.

  Department And Institute Of Biology And Anatomy National Defense Medical Center

• Lin J

  Center For Condensed Matter Sciences National Taiwan University

• Huang C.Y.

  Institute of Materials Science and Engineering, National Taiwan University

• Lin J.G.

  Center for Condensed Matter Sciences

• Liu R.S.

  Department of Chemistry, National Taiwan University

• Huang C.Y.

  Center for Condensed Matter Sciences, National Taiwan University

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