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

doi:10.1103/PhysRevLett.105.236403

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

Chemical Spectroscopy

Research output: Contribution to journal › Article › peer-review

18 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>T_c that may imply a specific ordering in the spin subsystem in the paramagnetic phase of MnSi.

Original language	English
Article number	236403
Journal	Physical Review Letters
Volume	105
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.105.236403
State	Published - Dec 2 2010

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10.1103/PhysRevLett.105.236403

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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.",

author = "Stishov, \{Sergei M.\} and Petrova, \{Alla E.\} and Shikov, \{Anatoly A.\} and Lograsso, \{Thomas A.\} and Isaev, \{Eyvaz I.\} and B{\"o}rje Johansson and Daemen, \{Luke L.\}",

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doi = "10.1103/PhysRevLett.105.236403",

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AU - Stishov, Sergei M.

AU - Petrova, Alla E.

AU - Shikov, Anatoly A.

AU - Lograsso, Thomas A.

AU - Isaev, Eyvaz I.

AU - Johansson, Börje

AU - Daemen, Luke L.

PY - 2010/12/2

Y1 - 2010/12/2

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/78649863966

U2 - 10.1103/PhysRevLett.105.236403

DO - 10.1103/PhysRevLett.105.236403

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JO - Physical Review Letters

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M1 - 236403

ER -

Lost heat capacity and entropy in the helical magnet MnSi

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