Lost heat capacity and entropy in the helical magnet MnSi

Sergei M. Stishov, Alla E. Petrova, Anatoly A. Shikov, Thomas A. Lograsso, Eyvaz I. Isaev, Börje Johansson, Luke L. Daemen

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The heat capacity of MnSi at B=0 and B=4T was measured in the temperature range 2.5-100 K. To analyze the data, calculations of the phonon spectrum and phonon density of states in MnSi were performed. The calculated phonon frequencies were confirmed by means of inelastic neutron scattering. The analysis of the data suggests the existence of negative contributions to the heat capacity and entropy of MnSi at T>Tc that may imply a specific ordering in the spin subsystem in the paramagnetic phase of MnSi.

Original languageEnglish
Article number236403
JournalPhysical Review Letters
Volume105
Issue number23
DOIs
StatePublished - Dec 2 2010
Externally publishedYes

Funding

FundersFunder number
Seventh Framework Programme228074

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