Observation of Spin Relaxation in a Vanadate Chloride with Quasi-One-Dimensional Linear Chain

Abstract

A new cobalt­(II) vanadate chloride, Pb2Co­(OH)­(V2O7)­Cl, has been synthesized under mild hydrothermal conditions. It contains quasi-one-dimensional (1D) linear chains built by edge-sharing of CoIIO6 octahedra. The cobalt­(II) oxide chains are further interconnected by (V2O7)4– dimers into a three-dimensional (3D) anionic framework with Pb2+ and Cl– ions residing in Co4V8 12-member ring tunnels. The intrachain Co···Co distance is 3.041 Å, while the interchain distances are 8.742 and 9.256 Å. Magnetic measurements suggest the ferromagnetic intrachain and the antiferromagnetic interchain interactions with a specific value of J intra/J inter = 1.7 × 103. Zero-field heat capacity demonstrates the magnetic long-range ordering at 5.5 K. Alternating current (AC) magnetic susceptibility under zero external direct current (DC) fields displays two slow magnetic relaxations at low temperatures, giving characteristic relaxations (τ0) of 1.2(3) × 10–12 and 1.9(4) × 10–10 s with effective energy barriers (Δτ) of 76.1(2) and 48.4(5) K. The energy barrier between the spin up and spin-down states can be ascribed to the ferromagnetic spin chain and the Ising-like magnetic anisotropy in Pb2Co­(OH)­(V2O7)­Cl.

Observation of a Large Magnetic Anisotropy and a Field-Induced Magnetic State in SrCo(VO4)(OH): A Structure with a Quasi One-Dimensional Magnetic Chain

“…This difference could be attributed to the highly anisotropic behavior that we observed in magnetic susceptibility. In addition, a relatively smaller magnetic entropy has been observed in 1D compounds such as CoSe 2 O 5 , Pb 2 Co­(V 2 O 7 )­(OH)­Cl, and SrMn­(VO 4 )­(OH). ,, …”

Synthesis, Crystal Structure, and Electrochemical Properties of an Isopolyoxovanadate Compound Modified Transition-Metal Complex Based on [V4O12]4−

“…In comparison with other POMs, the vanadium oxygen clusters exhibit unique structure and excellent performance due to the variable valence (from +3 to +5) and abundant coordination configurations (VO 4 tetrahedra, VO 5 square pyramid and trigonal bipyramid, VO 6 octahedra) of vanadium atom [7][8][9][10][11][12]. Var- 12− and so on, have been reported in the previous papers [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Exploration of Vanadium(IV)-Based Single-Ion Magnet Properties in Diphosphonate-Supported Mixed-Valent Polyoxovanadates

“…Particularly, vanadium­(IV)-based SMMs are potential nuclear spin systems for qubits, due to their ability to afford longer coherence times . Literature reports suggest that vanadium­(IV) complexes containing spin-free ligand systems can exhibit coherence times at low temperatures, that are long enough to perform quantum operations. ,− Similarly, SIMs based on vanadium­(III) have also been reported to display interesting magnetization dynamics. − …”