Local and long-range order and the influence of applied magnetic field on single-crystalline NiSb2O6

Abstract

The magnetic and thermal properties of single-crystalline NiSb2O6 are reported. The Ni 2+ ions exhibit local magnetic order below ∼50 K followed by long-range antiferromagnetic order below TN = 6.7 K. Analysis of the magnetic susceptibility data using the one-dimensional Heisenberg model with spin S = 1 results in a magnetic exchange coupling J || /kB ∼ 26.0(1) K. TN is observed to either increase or decrease depending upon whether field is applied perpendicular or parallel to the magnetic moment alignment axis. A two-sublattice magnetic structure, with the axis of alignment alternating by 90 • between neighboring layers along the crystallographic c axis, is argued to result in two magnetic transition temperatures for certain magnetic field directions, that agrees well with theory. This leads to a highly anisotropic magnetocaloric effect.

Significant magneto-elastic coupling at Griffiths-like phase boundaries in low dimensional oxides, ASb2O6 (A = Ni and Mn)

“…1(b), the dominant super-exchange paths (Ni-O-O-Ni) form the one-dimensional (1D) chains along [110] and [110] directions at z = 0 and 1/2, respectively [33,34]. A quasi-1D AFM order was proposed for NSO using the neutron diffraction studies [35,36], pointing an AFM ordering temperature (T N ) at 6.7 K [37]. On the other hand, MnSb 2 O 6 (MSO) carries the trigonal crystal structure with a P 321 space group [38,39,40].…”

Quasi-1D XY antiferromagnet Sr2Ni(SeO3)2Cl2 at Sakai-Takahashi phase diagram

“…5. 28 . Judging from the claimed values of J′/J and D/J ratios both systems should fall into the Haldane sector of this diagram.…”

Resonant scattering of phonons in the quasi-one-dimensional spin-chain compounds AB2O6 ( A = Ni, Co; BPrasai1, Christian2, Neumeier3 et al. 2018Phys. Rev. BSelf Cite4080View full textAdd to dashboardCite

“…Single-crystals studied in this work were grown by chemical vapor transport (Sb compounds) and optical floating-zone method (Ta compounds) as described in detail elsewhere. [5][6][7]9 Specimens were oriented by x-ray diffraction for heat flow along the principal crystallographic axes and along the chains ([110]), and polished into thin parallelopipeds with typical dimensions 1.5 × 0.18 × 0.18 mm 3 . A standard steady-state method was employed for measuring thermal conductivity, with temperature gradient produced by a chip heater and monitored by a 25-µm diameter chromel-constantan differential thermocouple.…”

“…The dominant exchange pathways defining their AF chains, 14 [A-O-O-A], are along the [110] and [110] directions, with their orientation rotating by 90 • between neighboring layers along the crystallographic c axis, thereby giving rise to a two-sublattice description of the magnetic structure. [5][6][7][8] Long-range ordering at T N in these compounds can be viewed as a 1D to 3D transition realized through alignment of q1D regions and further alignment of stray magnetic moments, 5,6 with differing magnetic unit cells 15 and values for T N reflecting variations in the weak inter-chain exchange coupling.…”