(color online) Illustration of the relationships between rejuvenation, aging and structure, H_c, B_m and density; the rejuvenation and aging cause the structure to change. The rejuvenation reduces structural correlation length and average anisotropy constant 〈K〉 and then H_c will decrease, whereas magnetic induction B_m will increase. The aging increases the structural correlation length and causes the contrary phenomena. K_i, D_i (i = r,a,n) denote anisotropy constant and structural correlation length for i-th state, where r, a, n are rejuvenated, aged and annealed state, respectively.