644 citations · 824 across the 11 of their papers we have counts for
6 papers · 1 filter
Tunable Thermal Expansion Behavior in the Intermetallic YbGaGe
F. R. Drymiotis, Y. Lee, G. Lawes +6
We investigate the effects of carbon and boron doping on the thermal expansion in the hexagonal (P63/mmc) intermetallic YbGaGe. X-ray powder diffraction was used to measure the lat…
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…
The Effect of Ru substitution for Ni on the superconductivity in MgCNi3-xRux
T. Klimczuk, V. Gupta, G. Lawes +2
The superconductor MgCNi3 has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi3-xRux for 0<x<0.5. Magnetic and specific heat measurements show…
Valence-electron transfer and a metal-insulator transition in a strongly correlated perovskite oxide
A. P. Ramirez, G. Lawes, D. Li +1
We present transport and thermal data for the quadruple-perovskites MCu3(Ti1-xRux)4O12 where 0 < x < 1. A metal-insulator transition (MIT) occurs for Ru concentrations x~0.75. At t…
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…
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 =…