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cond-mat.mtrl-sci2007★ 206 cited
Direct transition from a disordered to a multiferroic phase on a triangular lattice
M. Kenzelmann, G. Lawes, A. B. Harris +9
Competing interactions and geometric frustration provide favourable conditions for exotic states of matter. Such competition often causes multiple phase transitions as a function o…
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 =…
cond-mat.mtrl-sci2003
Magnetodielectric Effects from Spin Fluctuations in Isostructural Ferromagnetic and Antiferromagnetic Systems
G. Lawes, A. P. Ramirez, C. M. Varma +1
We report on the effects of spin fluctuations, magnetic ordering, and external magnetic field on the dielectric constant of the ferromagnet SeCuO3, and the antiferromagnet TeCuO3.…