Spin glassy behavior and large exchange bias effect in cubic perovskite Ba0.8Sr0.2FeO3-δ

Spin glassy behavior and large exchange bias effect in cubic perovskite Ba_0.8Sr_0.2FeO_3-δ

Liu Yu-Xuan^{1, 2}, Liu Zhe-Hong^{2, 3}, Ye Xu-Bin^{2, 3}, Shen Xu-Dong^{2, 3}, Wang Xiao^{2, 3}, Zhou Bo-Wen^{2, 3}, Zhou Guang-Hui^{1, †}, Long You-Wen^{2, 4, ‡}

(a) Plots of field dependence of magnetization measured at 2 K after cooling at different fields from 300 K to 2 K for Ba_0.8Sr_0.2FeO^2.81. Inset shows the enlarged view for the magnetic hysteresis loop measured at a 2-T cooling field. (b) Plots of H_EB and M_E as a function of H_CF obtained at 2 K.