Magnetic phase diagrams of the spinels AB2xGa2−2xO4 (A=Zn, Co; B=Al, Cr) systems

Magnetic properties of the spinel systems ACr2X4 (A = Zn, Cd, Hg; X = S, Se)

“…[15] analysis of the HTSE of the correlation length has been shown to be a useful method for the study of the critical region [16][17][18][19]. The model that we used in the present work is valid in the case of a spinel structure.…”

Study of Magnetic Phase Transition and Spin Frustration in Cobalt Aluminium Oxide Materials based on High Temperature Series Expansions Model

“…is diluted spinels systems of 2 4 CoCo O with nn exchange integral 1 5.376 J = − K and nnn superexchange integral 2 3.744 J K = − [11] and for 2 4 CoAl O the exchange interactions are: 1 1 J = − K and 2 0.5 J K = [12]. The obtained values of 1 J and 2 J for 0 0.2 x ≤ ≤ are given in the Table 1.…”

“…) have studied extensively [12]. In this work, we have determinate the values of the exchange interactions by the mean field theory in the ordered region [13] analysis of the high-temperature series expansions (HTSE) of the correlation functions has been shown to be a useful method for the study of the critical region [14,15].…”

“…) have studied extensively [12]. In this work, we have determinate the values of the exchange interactions by the mean field theory in the ordered region ( ) 0.3 1 x ≤ ≤ and by a probability law adapted of the nature of dilution problem in Aspinel lattice in the spin glass region in the range ( )…”

“…in the ordered phase (AFM) have been evaluated (see Table 1). The obtained values of the intra-plane and inter-plane interactions are given in Table 1 ( ) [12] ( ) In the last work [18], the authors used the probability law to calculate the exchange integrals. In this work, we have applied the same probability law in the diluted spinels systems…”