Transport, magnetic, thermodynamic and optical properties in Ti-doped Sr_2RuO_4

Details Transport, magnetic, thermodynamic and optical properties in Ti-doped Sr_2RuO_4 Transport, magnetic, thermodynamic and optical properties in Ti-doped Sr_2RuO_4

2001-10-19

arxiv.org/abs/cond-mat/0110412v1

Phys. Rev. B 65, 104523 (2002)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.65.104523

We report on electrical resistivity, magnetic susceptibility and magnetization, on heat capacity and optical experiments in single crystals of Sr_2Ru_(1-x)Ti_xO_4. Samples with x=0.1 and 0.2 reveal purely semiconducting resistivity behavior along c and the charge transport is close to localization within the ab-plane. A strong anisotropy in the magnetic susceptibility appears at temperatures below 100 K. Moreover magnetic ordering in c-direction with a moment of order 0.01 mu_B/f.u. occurs at low temperatures. On doping the low-temperature linear term of the heat capacity becomes reduced significantly and probably is dominated by spin fluctuations. Finally, the optical conductivity reveals the anisotropic character of the dc resistance, with the in-plane conductance roughly following a Drude-type behavior and an insulating response along c.

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