Magnetic studies in spinel solid solutions ZnxCd1−xCr2Se4 (0.35 ⩽ x ⩽ 0.45)

Magnetic structure and phase diagram of the frustrated spinel Cd1−xZnxCr2Se4

“…Finally for xX0.7, the system becomes helimagnetic according to previous works. In contrast to earlier phase diagrams [12][13][14]16] the different magnetic phases have been determined accurately. The phase diagram determined by Afif et al [21,22] using Ising model cannot describe correctly the system as it is a 3D Heisenberg system.…”

“…A preliminary magnetic phase diagram has been proposed [15] and no evidence of paramagnetic to spinglass transition appears in the region 0.4oxo0.6 but rather a perturbed order occurs for 0.5oxo0.6. Using the mean field theory and the spin wave theory, the exchange integrals for x ¼ 0.35, 0.41 and 0.45 were calculated to the third nearest neighbours [16,17]. A critical analysis has been performed on the samples x ¼ 0.35, 0.45 and 0.55.…”