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Transport phenomena in polycrystalline bulk samples of Ru1-xSbxSr2(Eu0.7Ce0.3)2Cu2O10-δ

G. ILONCA1,* , F. BEIUŞEANU2, V. TOMA1, T. JURCUT2, E.-V. MACOCIAN2

Affiliation

  1. Babeş – Bolyai University, Faculty of Physics, Cluj – Napoca, Romania
  2. Faculty of Sciences, University of Oradea, Oradea, Romania

Abstract

Samples in the system Ru1-xSbxSr2(Eu0.7Ce0.3)2Cu2O10-δ, were prepared by conventional solid state reaction method. The structural analysis was investigated using X-ray diffraction. Electrical resistivity, Hall effect, and magnetic susceptibility measurements on Ru:1222 doped with Sb are presented, together with results in the temperature range 5 K-300 K. Transition temperature decreases from 43 K for x=0.00 to 20 K for x=0.06 Sb. This may be due to a distortion of RuO6 octahedral, which is responsible of the increase in hole localization. The Hall effect anomalous decreases below Tmagnetic which may be explained within a simple two-band model by a transition from localized to more itinerant behavior in the RuO2 layer at Tmagnetic. The behavior of magnetic susceptibility is caused by an antisymetric exchange coupling of the Dzyaloshinsky – Morya type between neighboring Ru moments..

Keywords

High temperature superconductivity in Ru-1222, Transport properties, Hall effect, Magnetic properties.

Submitted at: Dec. 2, 2005
Accepted at: May 18, 2006

Citation

G. ILONCA, F. BEIUŞEANU, V. TOMA, T. JURCUT, E.-V. MACOCIAN, Transport phenomena in polycrystalline bulk samples of Ru1-xSbxSr2(Eu0.7Ce0.3)2Cu2O10-δ, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1132-1134 (2006)