Study of transport properties in the multi-spin Co-doped La2/3Ca1/3Mn1-xCoxO3 manganites

A series of Mn-site doping samples La2/3Ca1/3Mn1-xCoxO3(0 ≤x ≤ 0.15) with an excellent single phase structure have been prepared. The magnetic and transport properties of this system have been systematically investigated. The Curie temperature TC decreases gradually and the temperature range of transition becomes wider with the increase of x. The abnormal transport properties induced by Co were doping characterized by the resistivity behavior of double peaks and low temperature minimum.