Absence of magnetic phase separation in MnSi under pressure

Abstract

We report muon spin spectroscopy data (μSR) obtained under hydrostatic pressure on a large single crystal of the itinerant helimagnet MnSi and recorded down to 0.235 K and up to 15.1 kbar. Up to the critical pressure pc =14.9 (2) kbar, where the magnetic order is suppressed, the μSR data unambiguously demonstrate that the ground state of the system is magnetic with no indication of any phase separation. © 2010 The American Physical Society.