Abstract
Quasi-one-dimensional (Q1D) spin chain systems have great potential applications in high-density information storage devices, quantum information and computers, because of their quantum magnetism properties. The low-dimensional magnetic behavior has been investigated in ANb2O6, (A = Mn, Fe, Co or Ni) compounds, the structural and magnetic properties are very interesting because the system presents weakly interacting Ising chains, which leads to this quasi-one-dimensional magnetic order. Our investigation combines specific heat and magnetic measurements; x-ray and neutron diffraction (ND). In this work, we present a Co/Ni orthorhombic structure, called columbite, which crystallizes with Pbcn space group, whose formula is Co0.4Ni0.6Nb2O6. Co for Ni substitution induces a continuous lattice volume decrease, preserving the orthorhombic crystal structure. Magnetic susceptibility and specific heat measurements reveal that antiferromagnetic order occurs at 3.4 K, as a consequence of weak interchain interactions. Partial substitution of the magnetic ion tends to change the magnetic ordering observed in the CoNb2O6 and NiNb2O6. Lastly, we present this magnetic structure changes with the Ni-Co substitution.
Highlights
Magnetism remains a theme that has absorbed humanity for numerous generations
A maximum on this curve is observed at low-temperature region, which represents not a peak, but a broad maximum that characterizes lowdimensional magnetic materials
The compounds show that substitution of Co for Ni in NiNb2O6 preserves the orthorhombic crystal structure
Summary
The long-range interaction combined with the complex systems magnetism emerges in to make it an extremely challenging subject. Numerous composites, as CoNb2O6, have been synthesized serving as a model for the quantum spin system’s investigation with a one-dimensional arrangement of spins. This subject has proved interesting that they been calling attention from many different scientific communities; like physicists, engineers, chemists and biologists.. ANb2O6 compounds are considered prototype materials, seeing as they present low dimensional magnetic characteristics. These orthorhombic materials exhibit weak interactions in one-dimensional magnetic chains.. These orthorhombic materials exhibit weak interactions in one-dimensional magnetic chains. They present magnetic ordering, typically, below 10 K, in ordered antiferromagnetic (AF) phase, but they diverge from a simple nearest-neighbor Néel structure
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