Element Substitution Effects on Magnetic Properties of Spin-Frustrated Spinel ZnB₂O₄(B=Cr and Fe)

Abstract

We investigated magnetic properties of spinel oxides Zn (Cr1-xFex)2O4 to study element substitution effects on magnetism of spin-frustrated spinel oxides ZnCr2O4 and ZnFe2O4. The present study revealed that an antiferromagnetic order of ZnCr2O4 (TN ~ 13 K) is suppressed by Fe doping. Zn (Cr1-xFex)2O4 with x = 0.1, 0.5, and 0.7 exhibits spin-glass-like behavior below ~ 10 K. On the other hand, Zn (Cr1-xFex)2O4 with x = 0.3 exhibits the absence of magnetic order or spin-glass-like behavior down to low temperature (3 K), which is probably due to the competition of geometrical and bond frustrations.

Delayed tunneling of charges to deep traps in a ZnO impurity containing Cr3+ doped Zn2TiO4 inverse spinel

“…The inverse spinels have a general formula of A(AB)O 4 and have found applications in several interesting domains. [15][16][17][18] We observe that the emission maximum in this case can be shifted to 712 + 716 nm, in comparison to 707 nm reported for MgGa 2 O 4 . It is also possible to trap charges upon excitation at 615 (red), 520 (green), 365, and 254 nm (complete visible and UV regions).…”

Band Gap Modulation in Zn2TiO4 Spinels for Efficient UV-A Persistent Luminescence

“…Another class of spinels is complex spinels, which have a mixture of normal and inverse spinels. In recent reports, spinels have also found technological importance as suitable materials for magnetic [3], high-temperature ceramics [4], as superhard materials [5], and as materials suitable for high pressure sensing applications [6]. The common synthesis procedure of spinel-type materials is a solid-state method.…”