Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite

Formation of unusual Cr⁵⁺ charge state in CaCr_0.5Fe_0.5O₃ perovskite

Dai Jian-Hong^{1, 2}, Zhao Qing¹, Sun Qian¹, Zhang Shuo³, Wang Xiao^{1, 2}, Shen Xu-Dong^{1, 2}, Liu Zhe-Hong^{1, 2}, Shen Xi^{1, 2}, Yu Ri-Cheng¹, Chan Ting-Shan⁴, Li Lun-Xiong⁵, Zhou Guang-Hui⁶, Yang Yi-feng^{1, 2, †}, Jin Chang-Qing^{1, 2}, Long You-Wen^{1, 2, ‡}

(color online) Resistivity as a function of temperature for CaCr_0.5Fe_0.5O₃. The red line in the inset shows the fitting result on the basis of the 3D Mott variable-range-hopping model between 200 K and 300 K.