Cluster spin glass behavior in geometrically frustrated Zn₃V₃O₈

Abstract

We report the bulk magnetic properties of a yet unexplored vanadium-based multi-valenced spinel system, Zn3V3O8. A Curie-Weiss fit of our dc magnetic susceptibility χ(T ) data in the temperature region of 140−300 K yields a Curie constant C = 0.75 cm 3 K/mole V, θCW = −370 K. We have observed a splitting between the zero field cooled ZFC and field cooled FC susceptibility curves below a temperature Tirr of about 6.3 K. The value of the 'frustration parameter' (∼ 100) suggests that the system is strongly frustrated. From the ac susceptibility measurements we find a logarithmic variation of freezing temperature (T f ) with frequency ν attesting to the formation of a spin glass below T f . However, the value of the characteristic frequency obtained from the Vogel-Fulcher fit suggests that the ground state is closer to a cluster glass rather than a conventional spin glass. We explored further consequences of the spin glass behavior and observed aging phenomena and memory effect (both in ZFC and FC). We found that a positive temperature cycle erases the memory, as predicted by the hierarchical model. From the heat capacity CP data, a hump-like anomaly was observed in CP /T at about 3.75 K. Below this temperature the magnetic heat capacity shows a nearly linear dependence with T which is consistent with the formation of a spin glass state below T f in Zn3V3O8.

Phase-separated magnetic ground state in Mn3Ga0.45Sn0.55C

“…Refinement results presented in Figure δT f = 0.28) 7 and is close to that of typical cluster glass systems 43 .…”

A rock-salt-type Li-based oxide, Li3Ni2RuO6, exhibiting a chaotic ferrimagnetism with cluster spin-glass dynamics and thermally frozen charge carriers

“…For the feature around 40 K, we obtained T g≈28 K, zν≈7.12 and τ ≈1.8 × 10 −4  s. For the one around 80 K, corresponding values are: ~80 K, ~2.6 and ~1.6 × 10 −7 s. For a conventional spin glasses2, the zν value falls in the range ~4–13, and τ 0 value ranges between 10 −10 and 10 −13  s. It is clear that the values of τ 0  obtained are in general higher than that for the conventional spin glasses. But the deviation is highly pronounced for the feature around 20–40 K. Judged by these values, one can interpret2223 that the ferrimagnetic regions form clusters exhibiting spin-glass-like inter-cluster dynamics, with the cluster-glass behavior gradually strengthening with decreasing temperature. The parameters derived from isothermal remnant behavior also offers support for cluster-glass behavior, as described earlier.…”

Spin liquid and infinitesimal-disorder-driven cluster spin glass in the kagome lattice

“…Recently, low-temperature short-range correlations have been reported in a plenty of geometrically frustrated magnets [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In several of these materials, as [18], some degree of glassiness is observed.…”

“…However, the microscopic signatures are often different from the canonical spin glasses. In particular, a CSG state, in which clusters of spins behave as magnetic unities, is the ground-state of various geometrically frustrated systems [9,10,15,16]. * mateusing85@gmail.com † fabiozimmer@gmail.com ‡ sgmagal@gmail.com For this class of systems, it has been proposed that the presence of clusters can provide hypersensitivity to disorder [8].…”