Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures

Details Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures

2003-10-28

arxiv.org/abs/cond-mat/0310674v1

Phys. Rev. Lett. 92, 086403 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.086403

The pressure induced quantum phase transition of the weakly itinerant ferromagnet MnSi is studied using zero-field $^{29}Si$ NMR spectroscopy and relaxation. Below $P^*\approx 1.2GPa$, the intensity of the signal and the nuclear spin-lattice relaxation is independent of pressure, even though the amplitude of the magnetization drops by 20% from the ambient pressure amplitude. For $P>P^*$, the decreasing intensity within the experimentally detectable bandwidth signals the onset of an inhomogeneous phase that persists to the highest pressure measured, $P\ge 1.75GPa$, which is well beyond the known critical pressure $P_c=1.46GPa$. Implications for the non-Fermi Liquid behavior observed for $P>P_c$ are discussed.

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