NMR Study of MnSi under Pressure

Details NMR Study of MnSi under Pressure NMR Study of MnSi under Pressure

1998-02-23

arxiv.org/abs/cond-mat/9802236v1

Proc. Joint Conf.: AIRAPT-16 & HPCJ-38 (Kyoto 1997)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 2 figures. To be published in the Review of High Pressure Science and Technology

Scientific paper

The magnetic phase diagram $T_c(P)$ of the weak itinerant helimagnetic compound MnSi is reviewed upon a Nuclear Magnetic Resonance (NMR) experiment. We present a systematic study on the evolution of the NMR spin echo signal at $T=1.4$ K of the non-magnetic silicone sites, $^{29}$Si, up to 17.8 kbar. The pressure effect is interpreted as a weak variation of the local electronic spin polarization and the coexistence of magnetic and non magnetic Mn atoms under pressure. From the volume dependence of $f_0$ ($P$), we show notably that a local magnetic order remains above the critical pressure of $P_c=14.8$ kbar.

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