AC magnetic susceptibility of a single crystal of MnSi was measured along the ferromagnetic phase-transition line up to a pressure of 0.8 GPa created by compressed helium. The results show that the tricritical point is situated at much lower pressure and at significantly higher temperature (Ptr~0.355 GPa, Ttr~25.2 K) than was reported previously (~1.2 GPa,~12 K). These new observations put certain constraints on the origin of the tricritical point in MnSi.
@article{arxiv.cond-mat/0509294,
title = {Tricritical behavior in MnSi at nearly hydrostatic pressure},
author = {Alla E. Petrova and Vladimir Krasnorussky and John Sarrao and Sergei M. Stishov},
journal= {arXiv preprint arXiv:cond-mat/0509294},
year = {2009}
}
Comments
6 pages, 6 figures, reference [16] on page 5 removed