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Heat capacity and thermal expansion of the itinerant helimagnet MnSi

Journal of physics. Condensed matter, 2008-06, Vol.20 (23), p.235222-235222 (6) [Peer Reviewed Journal]

ISSN: 0953-8984 ;EISSN: 1361-648X ;DOI: 10.1088/0953-8984/20/23/235222 ;PMID: 21694313

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  • Title:
    Heat capacity and thermal expansion of the itinerant helimagnet MnSi
  • Author: Stishov, S M ; Petrova, A E ; Khasanov, S ; Kh Panova, G ; Shikov, A A ; Lashley, J C ; Wu, D ; Lograsso, T A
  • Is Part Of: Journal of physics. Condensed matter, 2008-06, Vol.20 (23), p.235222-235222 (6)
  • Description: The heat capacity and thermal expansion of a high quality single crystal of MnSi were measured at ambient pressure at zero and high magnetic fields. The calculated magnetic entropy change in the temperature range 0-30 K is less than 0.1R, a low value that emphasizes the itinerant nature of magnetism in MnSi. A linear temperature term dominates the thermal expansion coefficient in the range 30-150 K, which correlates with an enhancement of the linear electronic term in the heat capacity. A surprising similarity among the variations of the heat capacity, thermal expansion coefficient and temperature derivative of the resistivity is observed through the phase transition in MnSi. Specific forms of the heat capacity, thermal expansion coefficient and temperature derivative of resistivity at the phase transition to a helical magnetic state near 29 K are interpreted as the combination of sharp first-order features and broad peaks or shallow valleys of as yet unknown origin. The appearance of these broad satellites probably hints at a frustrated magnetic state slightly above the transition temperature in MnSi.
  • Publisher: England: IOP Publishing
  • Language: English
  • Identifier: ISSN: 0953-8984
    EISSN: 1361-648X
    DOI: 10.1088/0953-8984/20/23/235222
    PMID: 21694313
  • Source: Alma/SFX Local Collection
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