标题： 铁磁相中Gd1-xCaxBaCo2O5.53的极化子输运 显示英文标题

标题： Polaronic transport in the ferromagnetic phase of Gd1-xCaxBaCo2O5.53

摘要： 温度依赖的电阻率和热电势测量在Gd1-xCaxBaCo2O5.53上进行，其中x在0到0.25之间变化。 钙取代导致空穴（Co4+）进入系统，这导致电阻率降低，并在低温下稳定铁磁相。 在钙掺杂样品中，电阻率和热电势的温度依赖性明显不同，与原始样品相比，电阻率显著降低。 电阻率和热电势随温度的变化被解释为钙掺杂系统铁磁相中极化子的输运。 显示英文摘要

摘要： Temperature dependent electrical resistivity and thermopower measurements were carried out on Gd1-xCaxBaCo2O5.53 with x varying between 0 and 0.25. Ca subsitution leads to the incorporation of holes (Co4+) into the system that leads to a reduction in resistivity and a stabilisation of the ferromagnetic phase at low temperatures. The temperature dependence of resistivity and thermopower are markedly different in the Ca doped sample, with a dramatic reduction in the resistivity, as compared to that in the pristine sample. The variation in both the resistivity and thermopower with temperature is explained in terms of the transport of polarons in the ferromagnetic phase of Ca doped system.