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Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures

W. Yu·F. Zamborszky·J. D. Thompson·J. L. Sarrao·M. E. Torelli·Z. Fisk·S. E. Brown
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Abstract

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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W. Yu, F. Zamborszky, J. D. Thompson, J. L. Sarrao, M. E. Torelli, Z. Fisk, S. E. Brown. 2003-10-28. Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures. https://doi.org/10.1103/physrevlett.92.086403

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