Magnetic Moment of MnSi
ORAL
Abstract
MnSi is a metallic helimagnet below 29 K. Density functional theory predicts that it has a moment of 1.0 $\mu_B$/Mn, which is much larger than the measured value of ~0.4 $\mu_B$/Mn. By adding a Hubbard-U correction, we have found a ground state with a moment consistent with the experimental value. These solutions posess a novel quadrupolar spin ordering. We discuss their behavior under pressure and in a magnetic field.
*This work is supported in part by NSF-OCI Grant No. 043812 and a Faculty Research Grant from the LSU Office of Sponsored Research.
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