Magnetic Structures of the LiNi0.9Co0.1PO4 Crystal

We present the magnetic structures and properties of single crystal and polycrystalline samples LiNi 0.9 Co 0.1 PO 4 obtained by conventional self-flux (LiCl) growth from solution and glycerol-nitrate methods, respectively. The samples were studied with magnetic property measurement system, X-ray and neutron diffraction. A symmetry analysis of possible magnetic structures for the propagation vectors k C = 0 and k IC = (0, k , 0) was carried out. The magnetic structures in the LiNi 0.9 Co 0.1 PO 4 single crystal are commensurate ( k C = 0) and incommensurate ( k IC = (0, k , 0)) antiferromagnetic orders. The module k is equal 0.10–0.12 reciprocal lattice units at low temperatures. At 7 K, the magnetic moment of the 3 d -ion is 2.0 μ B and decreases to zero at 21 K. The temperatures of magnetic phase transitions determined during magnetic property measurements are similar in single-crystal and polycrystalline samples. Single crystal neutron diffraction is made it possible to observe some details of the incommensurate structure.