Addendum: "On the nature of the phase transition in the itinerant helimagnet MnSi", arXiv:cond-mat/0702460v1 [cond-mat.str-el]

TL;DR

This paper presents high-resolution measurements of heat capacity, resistivity, and thermal expansion in MnSi, revealing symmetry and similarities in their behavior near the phase transition, and showing insensitivity of certain properties to moderate magnetic fields.

Contribution

It provides new high-precision data on MnSi's thermodynamic and transport properties, highlighting symmetries and field insensitivity near the phase transition.

Findings

Mirror symmetry between resistivity derivative and thermal expansion.

Similarity between heat capacity and resistivity derivative near transition.

Heat capacity and thermal expansion unaffected by moderate magnetic fields.

Abstract

New high resolution data for heat capacity, heat capacity under applied magnetic fields and resistivity of high quality single crystal of MnSi are reported. Striking mirror symmetry between temperature derivative of resistivity and thermal expansion coefficient of MnSi is displayed. Close similarity between variation of the heat capacity and the temperature derivative of resistivity through the phase transition is observed. It is shown that the heat capacity and thermal expansion coefficient of the helical phase are not influenced by moderate magnetic field.