High Pressure studies of the magnetic phase transition in MnSi: revisited

Abstract

New measurements of AC magnetic susceptibility and DC resistivity of a high quality single crystal MnSi were carried out at high pressure making use of helium as a pressure medium. The form of the AC magnetic susceptibility curves at the magnetic phase transition suddenly changes upon helium solidification. This implies strong sensitivity of magnetic properties of MnSi to non hydrostatic stresses and suggests that the early claims on the existence of a tricritical point at the phase transition line are probably a result of misinterpretation of the experimental data. At the same time resistivity behavior at the phase transition does not show such a significant influence of helium solidification. The sharp peak at the temperature derivative of resistivity, signifying the first order nature of the phase transition in MnSi successfully survived helium crystallization and continued the same way to the highest pressure.

arXiv comment4 pages, 6 figures

References in corpus (6)

• First order transitions and multicritical points in weak itinerant ferromagnets
• The Absence of Superconductivity in Single Phase CaFe2As2 under Hydrostatic Pressure
• Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr${}_{1-x}$Ca${}_x$)RuO${}_3$
• Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures
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Cited by in corpus (7)

• Metallic Quantum Ferromagnets
• Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
• Itinerant ferromagnetism in an atomic Fermi gas: Influence of population imbalance
• Magnetic phase diagram, magnetotransport and inverse magnetocaloric effect in the noncollinear antiferromagnet Mn${}_5$Si${}_3$
• Absence of magnetic phase separation in MnSi under pressure
• Comment on "Nature of the high-pressure tricritical point in MnSi"
• The Vollhardt crossing point at high magnetic field