Magnetotransport properties in the magnetic phase of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>BaFe</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>T</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow><mml:mspace width="4.pt" /><mml:mrow><mml:mo>(</mml:mo><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mi>Co</mml:mi><mml:mo>,</mml:mo><mml:mi>…

J. P. Peña, M. M. Piva, P. F. S. Rosa, P. G. Pagliuso, C. Adriano, Ted Grant, Z. Fisk, E. Baggio‐Saitovitch, P. Pureur

Abstract

Because of their complex Fermi surfaces, the identification of the physical phenomena contributing to electronic scattering in the Fe-based superconductors is a difficult task. Here, we report on the electrical resistivity, magnetoresistance, and Hall effect in two series of BaFe$_{2-x}$T$_x$As$_2$ (T = Co, Ni) crystals with different values of $x$. The T contents were chosen so that the majority of the investigated samples present an intermediate magnetically ordered state and a superconducting ground state. We interpret the obtained results in terms of scattering of charge carriers by magnetic excitations instead of describing them as resulting uniquely from effects related to multiple-band conduction. Our samples are single crystals from the structural point of view and their overall magnetotransport properties are dominated by a single magnetic state.

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• Physical review. B./Physical review. B - View
• arXiv (Cornell University) - View - PDF
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