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Temperature Dependence of Resistivity of $Sr_2CoMoO_{6-δ}$ Films

C. L. Yuan·Z. Y. Zeng·Y. Zhu·P. P. Ong·Z. X. Shen·C. K. Ong
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Abstract

We investigate the temperature dependence of the resistivity and magnetoresistance of a polycrystalline $Sr_2CoMoO_{6-δ}$ film deposited on (100)-$SrTiO_3$ substrate prepared by the pulsed laser deposition method. X-ray diffraction, Raman and magnetoresistance results demonstrate clearly the coexistence of a ferromagnetic metallic and an antiferromagnetic (or paramagnetic) insulating domain. Percolative transition between these two phases as the temperature varies, which is believed to induce a metal-insulator transition at around $T_C$, has been directly observed in our measurements of the temperature dependence of the sample resistivity. Thus we have provided new direct evidence that a phase separation scenario also exists in the ordered double-perovskite structure materials.

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C. L. Yuan, Z. Y. Zeng, Y. Zhu, P. P. Ong, Z. X. Shen, C. K. Ong. 2003-07-23. Temperature Dependence of Resistivity of $Sr_2CoMoO_{6-δ}$ Films. https://arxiv.org/abs/cond-mat/0307527

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