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cond-mat.str-el2004
Competing Magnetic Phases on a "Kagome Staircase"
G. Lawes, M. Kenzelmann, N. Rogado +11
We present thermodynamic and neutron data on Ni_3V_2O_8, a spin-1 system on a kagome staircase. The extreme degeneracy of the kagome antiferromagnet is lifted to produce two incomm…
cond-mat.str-el2004
Low temperature phase transitions and crystal structure of Na0.5CoO2
Q. Huang, M. L. Foo, J. W. Lynn +7
The crystal structure of Na0.5CoO2, determined by powder neutron diffraction, is reported. The structure consists of layers of edge-shared CoO6 octahedra in a triangular lattice, w…
cond-mat.mtrl-sci2004
Absence of ferromagnetism in Co and Mn substituted polycrystalline ZnO
G. Lawes, A. S. Risbud, A. P. Ramirez +1
We discuss the properties of semiconducting bulk ZnO when substituted with the magnetic transition metal ions Mn and Co, with substituent fraction ranging from = 0.02 to =…