Magnetization under High Pressure in MnSi

Details Magnetization under High Pressure in MnSi Magnetization under High Pressure in MnSi

1998-02-23

arxiv.org/abs/cond-mat/9802238v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 5 figures. Submitted to Phys. Rev. B

Scientific paper

10.1143/JPSJ.67.3605

The magnetization M(H) has been measured in the weakly helimagnetic itinerant compound MnSi under high pressure up to 10.2 kbar and high magnetic field up to 9 Tesla. We interpret the simultaneous decrease under pressure of the saturated magnetization, $p_s$, and the Curie temperature, $% T_c$ in the frame of the self-consistent renormalization theory (SCR) of spin fluctuations. From the analysis of the so-called Arrot-plot ($H/p [ H,T ] $ versus $p^2[ H,T ] $) and the respective volume dependence of $p_s$ and $T_c$, we estimate the evolution of the characteristic spin fluctuation temperatures, $T_0$ and $T_A$ when the system approaches its critical pressure, $P_c$=15 kbar, corresponding to the disappearance of the long range magnetic order at T=0.

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