# Double phase transition in the triangular antiferromagnet Ba3CoTa2O9.

@article{Ranjith2017DoublePT,
title={Double phase transition in the triangular antiferromagnet Ba3CoTa2O9.},
author={K. M. Ranjith and K. Brinda and U. Arjun and N. Hegde and R. Nath},
journal={Journal of physics. Condensed matter : an Institute of Physics journal},
year={2017},
volume={29 11},
pages={
115804
}
}
• K. M. Ranjith, +2 authors R. Nath
• Published 2017
• Chemistry, Medicine, Physics
• Journal of physics. Condensed matter : an Institute of Physics journal
Here, we report the synthesis and magnetic properties of a new triangular lattice antiferromagnet Ba3CoTa2O9. The effective spin of Co2+ is found to be J  =  1/2 at low temperatures due to the combined effect of crystal field and spin-orbit coupling. Ba3CoTa2O9 undergoes two successive magnetic phase transitions at [Formula: see text] K and [Formula: see text] K in zero applied field, which is typical for triangular antiferromagnets with the easy-axis magnetic anisotropy. With increasing field… Expand
10 Citations

#### Figures and Topics from this paper

Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe 2
High-quality single crystals of ${\mathrm{NaYbSe}}_{2}$, which resembles a perfect triangular-lattice antiferromagnet without intrinsic disorder, are investigated by magnetization and specific heat,Expand
Spin liquids in geometrically perfect triangular antiferromagnets.
• Physics, Medicine
• Journal of physics. Condensed matter : an Institute of Physics journal
• 2020
This brief review juxtapose recent theoretical developments that trace the parameter regime of the spin-liquid phase with experimental results for Co-based and Yb-based triangular antiferromagnets, and the notion of a geometrically perfect triangular system is scrutinized. Expand
Exotic magnetic field-induced spin-superstructures in a mixed honeycomb triangular lattice system
The temperature-magnetic-field phase diagram of the mixed honeycomb triangular lattice system K$_{2}$Mn$_{3}$(VO$_{4}$)$_{2}$CO$_{3}$ is investigated by means of magnetization, heat capacity andExpand
Field-induced instability of the quantum spin liquid ground state in the J eff =1/2 triangular-lattice compound NaYbO 2
Polycrystalline samples of ${\mathrm{NaYbO}}_{2}$ are investigated by bulk magnetization and specific-heat measurements, as well as by nuclear magnetic resonance (NMR) and electron spin resonanceExpand
Magnetic diversity in three-dimensional two-fold-interpenetrated structures: a story of two compounds.
• Chemistry, Medicine
• Dalton transactions
• 2017
A magnetostructural correlation has been carried out for two newly synthesized two-fold-interpenetrated three-dimensional structures and compound 2 was found to be weakly antiferromagnetic in nature with a negligible interaction between the magnetic Co2+ ions. Expand
Thermal evolution of quasi-one-dimensional spin correlations within the anisotropic triangular lattice of α -NaMnO 2
• Materials Science, Physics
• 2018
Magnetic order on the spatially anisotropic triangular lattice of $\alpha$-NaMnO$_2$ is studied via neutron diffraction measurements. The transition into a commensurate, collinear antiferromagneticExpand
Impact of Postsynthetic Modification on the Electrical and Magnetic Properties of Materials.
• Chemistry, Medicine
• Inorganic chemistry
• 2017
The strong magnetic frustration in Tb@1 is found to arise from the nearly triangular arrangement of Tb3+ ions in its secondary building unit along the chain direction. Expand
Magnetic field induced ferroelectricity and half magnetization plateau in polycrystalline R 2 V 2 O 7 ( R = Ni , Co )
Low-dimensional frustrated antiferromagnet is a good model system to study exotic quantum physics. Here we report the observation of half magnetization plateau and ferroelectricity which emergeExpand
Six-loop ε expansion study of three-dimensional O(n)×O(m) spin models
• Mathematics, Physics
• 2019
The Landau-Wilson field theory with $O(n)\times O(m)$ symmetry which describes the critical thermodynamics of frustrated spin systems with noncollinear and noncoplanar ordering is analyzed in $4 -Expand Phase coexistence and negative thermal expansion in the triple perovskite iridate Ba3CoIr2O9 • Materials Science, Physics • 2020 The anomalous thermal expansion in a layered 3$d$-5$d$based triple perovskite iridate Ba$_{3}$CoIr$_{2}$O$_{9}$is investigated using high resolution synchrotron diffraction. Below theExpand #### References SHOWING 1-10 OF 43 REFERENCES Magnetic Phase Transition of the Triangular Lattice Antiferromagnet CsMnI3 • Physics • 1990 The universality class of successive magnetic phase transitions in the triangular lattice antiferromagnet CsMnI 3 is studied by measuring the critical exponent β using neutron scattering. A weakExpand Successive magnetic phase transitions and multiferroicity in the spin-one triangular-lattice antiferromagnet Ba3NiNb2O9. Ba3NiNb2O9 is a unique triangular-lattice antiferromagnet exhibiting both uud phase and multiferroicity and the ferroelectricity switches on at each phase boundary with appearance of spontaneous polarization. Expand Multiple magnetic transitions in the spin-$\frac12\$ chain antiferromagnet SrCuTe2O6
• Materials Science, Physics
• 2015
Using thermodynamic measurements and density-functional band-structure calculations, we explore magnetic behavior of SrCuTe2O6. Despite being a structural sibling of a three-dimensional frustratedExpand
Magnetic Superstructure in the Two-Dimensional Quantum Antiferromagnet SrCu2(BO3)2
The observation of magnetic superstructure in a magnetization plateau state of SrCu2(BO3)2, a frustrated quasi–two-dimensional quantum spin system, and the crystallization of itinerant triplets in the plateau phase within a large rhomboid unit cell shows oscillations of the spin polarization. Expand
Magnetization process and collective excitations in the S=1/2 triangular-lattice Heisenberg antiferromagnet Ba3CoSb2O9.
From a detailed analysis of the collective ESR modes observed in the ordered state, combined with the magnetization process, all the magnetic parameters including the interlayer and anisotropic exchange interactions are determined. Expand
Structural and magnetic properties of pseudo-two-dimensional triangular antiferromagnets Ba3MSb2O9 (M = Mn, Co, and Ni)
• Chemistry
• 2004
The crystal structure and magnetic properties of 6H-perovskites Ba3MSb2O9 (M = Mn, Co, and Ni) were investigated. The M = Co and Ni compounds have a hexagonal structure with space group P63/mmc,Expand
Successive phase transitions and extended spin-excitation continuum in the S=1/2 triangular-lattice antiferromagnet Ba3CoSb2O9.
Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba3CoSb2O9 is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and twoExpand
Phase Transitions of Anisotropic Heisenberg Antiferromagnets on the Triangular Lattice
• Physics
• 1985
Phase transitions in anisotropic Heisenberg antiferromagnets with nearest neighbour coupling constants ( J x , J y , J z ) on the triangular lattice have been investigated. In particular, for theExpand
Magnetization plateau in the frustrated quantum spin system Cs 2 CuBr 4
• Materials Science
• 2003
The magnetic phase transitions of Cs 2 CuBr 4 , which may be described as a spin- quasi-two-dimensional frustrated antiferromagnet, were investigated by means of magnetization and specific heatExpand
Theory of Magnetism in CoCl2·2H2O
Crystal field theory developed by Abragam and Pryce has been used to formulate the anisotropic exchange interactions in CoCl 2 ·2H 2 O and CoBr 2 ·2H 2 O. These crystals are antiferromagnets in whichExpand