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Ni3TeO6 - a collinear antiferromagnet with ferromagnetic honeycomb planes

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arxiv 0912.5268 v1 pith:7WM5CB4K submitted 2009-12-29 cond-mat.mtrl-sci cond-mat.str-el

Ni3TeO6 - a collinear antiferromagnet with ferromagnetic honeycomb planes

classification cond-mat.mtrl-sci cond-mat.str-el
keywords c-axismagneticalongantiferromagnetbelowferromagnetichoneycomblattice
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report a comprehensive study of magnetic properties of Ni3TeO6. The system crystallizes in a noncentrosymmetric rhombohedral lattice, space group R3. There are three differently coordinated Ni atoms in the unit cell. Two of them form an almost planar honeycomb lattice, while the third one is placed between the layers. Magnetization and specific heat measurements revealed a single magnetic ordering at TN = 52 K. Below TN the susceptibility with the magnetic field parallel to the c-axis drops towards zero while the perpendicular susceptibility remains constant, a characteristic of antiferromagnetic materials. Neutron diffraction confirmed that the system is antiferromagnet below TN with ferromagnetic ab-planes stacked antiferromagnetically along the c-axis. All Ni moments are in the S = 1 spin state and point along the c-axis.

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