Magnetic phase diagram of CoNb2O6: A neutron diffraction study

Magnetic behavior of the NixFe1−xNb2OSarvezuk1, Gusmao2, Cunha3 et al. 2012Phys. Rev. B183131View full textAdd to dashboardCite

“…Similar behavior has been reported for isotype compounds. 2 This transition does not appear in the isothermal magnetization curves recorded for Ni 0.2 Fe 0.8 Nb 2 O 6 , gathered in the bottom panel of Fig. 9.…”

“…Powder samples were prepared with appropriate amounts of Fe 2 in air at ambient condition since the x-ray pattern has been found to be identical after several months. A large amount of sample, at about 2.5 g, was prepared for the neutron diffraction measurements (ND).…”

“…While the tantalites are tetragonal and present quasi-two-dimensional magnetic properties, the niobates are orthorhombic and characterized by quasi-one-dimensional magnetism [1][2][3] besides presenting interesting optical and dielectric properties. [4][5][6][7] The MNb 2 O 6 compounds present the Pbcn orthorhombic space group, 1,2 known as columbite structure.…”

“…A noncollinear canted structure has later been suggested based on magnetization measurements as well as group theoretical considerations. 11,12 The magnetic phase diagram for nickel and iron columbites has been reinvestigated by Heid et al, 1,2 who showed that both FeNb 2 O 6 and NiNb 2 O 6 exhibit antiferromagnetic order with a canted magnetic structure. They also established the presence of two phases, with propagation vectors, (0,1/2,0) and (1/2,1/2,0), on the basis of magnetic measurements combined with neutron diffraction carried out on both powder samples and single crystals.…”

Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNbSarvezuk1, Kinast2, Colin3 et al. 2011Phys. Rev. B

“…Whereas the MTa 2 O 6 compounds are tetragonal and present quasi-two-dimensional magnetic behavior, 1,2 the crystal structure of MNb 2 O 6 belongs to the P bcn orthorhombic space group, 3,4 or colombite structure, which yields quasi-one-dimensional magnetism. [3][4][5] The structure can be viewed as a stacking of slightly tilted oxygen octahedra surrounding the cations, forming zigzag chains along the c axis. Such zigzag chains are also characteristic of the α-PbO 2 structure.…”