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NMR Study of MnSi under Pressure

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arxiv cond-mat/9802236 v1 pith:HASNVJGL submitted 1998-02-23 cond-mat.str-el

C. Thessieu , K. Ishida , Y. Kitaoka , K. Asayama , G. Lapertot This is my paper · ORCID
classification cond-mat.str-el
keywords magneticpressurekbarlocalmnsispinunderweak
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abstract

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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