3 papers
cond-mat.str-el2004
Why the magnetic interactions in NaCoO are 3D
M. D. Johannes, I. I. Mazin, D. J. Singh
The puzzle of 3D magnetic interactions in the structurally 2D layered oxide NaCoO is addressed using first principles calculations and analysis of the exchange mechanisms…
cond-mat.mtrl-sci2003
Structural Aspects of Magnetic Coupling in CaCu3Mn4O12 and CaCu3Ti4O12
M. D. Johannes, W. E. Pickett, R. Weht
Two perovskite-derived materials, CaCu3Mn4O12 and CaCu3Ti4O12, have drawn much recent interest due to their magnetoresistive, dielectric, and magnetoelectronic characteristics. Her…
cond-mat.supr-con2002
MgCNi3 : Complex behavior in a strongly coupled superconductor
A. Waelte, H. Rosner, M. D. Johannes +8
Polycrystalline samples of the recently discovered MgCNi3 superconductor were investigated by transport, ac susceptibility, dc magnetization and specific heat measurements in magne…