Formation and partial melting of two types of spin-cluster glass behavior in vanadate spinel.
We report the doping effect on the various properties of spinels Co(1-x)Zn(x)V(2)O(4) (0 ≤ x ≤ 0.2). For the parent compounds, the rise in magnetization, the valley in thermal conductance, the transition from the ferromagnetic arrangement to non-collinear alignment indicated by the specific heat for the V sublattice, especially the frequency dependence of AC susceptibility around T(1) = 59 K, verify the occurrence of the transition at T(1) besides the ferrimagnetic transition at T(C). The ferrimagnetic transition at T(C) induces the spin-cluster glass behavior and the transition at T(1) yields the new spin-cluster glass (NSCG) behavior. As the Zn(2+)-doped content increases, the above phenomena are gradually weakening to vanishing, but the glassy behavior at T(C) still exists for all samples. Through the fourth-order perturbation theory, we discuss the reasons for the gradual vanishing of the transition at T(1).
High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei 230026, People's Republic of China.
Yuanjie
Y
Huang
Li
L
Pi
Shun
S
Tan
Zhaorong
Z
Yang
Yuheng
Y
Zhang