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Magnetocaloric effect and magnetostructural coupling in Mn0.92Fe0.08CoGe compound

Journal Article


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Abstract


  • The structural properties of Mn0.92Fe0.08CoGe have been investigated in detail using synchrotron x-ray diffraction in zero and applied pressure (p = 0–10 GPa). A ferromagnetic transition occurs around TC = 300 K and a large magnetic-entropy change −ΔSM = 17.3 J/kg K detected at TC for a field change of ΔB = 5 T. The field dependence of −ΔS M max can be expressed as −ΔS M max ∝ B. At ambient temperature and pressure, Mn0.92Fe0.08CoGe exhibits a co-existence of the orthorhombic TiNiSi-type structure (space group Pnma) and hexagonal Ni 2In-type structure (space group P63/mmc). Application of external pressure drives a structure change from the orthorhombic TiNiSi-type structure to the hexagonal Ni 2In-type structure. A large anomaly in heat capacity around TC is detected and the Debye temperature θD (=319(±10) K) has been derived from analyses of the low temperature heat capacity, T ≲ 10 K.

Authors


  •   Wang, Jian Li.
  •   Shamba, Precious (external author)
  •   Hutchison, Wayne D. (external author)
  •   Gu, Qinfen (external author)
  •   Md Din, M F. (external author)
  •   Ren, Qing Yon (external author)
  •   Cheng, Zhenxiang
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2015

Citation


  • Wang, J. L., Shamba, P., Hutchison, W. D., Gu, Q. F., Md Din, M. F., Ren, Q. Y., Cheng, Z. X., Kennedy, S. J., Campbell, S. J. & Dou, S. X. (2015). Magnetocaloric effect and magnetostructural coupling in Mn0.92Fe0.08CoGe compound. Journal of Applied Physics, 117 (17), 17D103-1-17D103-4.

Scopus Eid


  • 2-s2.0-84923658977

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2356&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1355

Start Page


  • 17D103-1

End Page


  • 17D103-4

Volume


  • 117

Issue


  • 17

Abstract


  • The structural properties of Mn0.92Fe0.08CoGe have been investigated in detail using synchrotron x-ray diffraction in zero and applied pressure (p = 0–10 GPa). A ferromagnetic transition occurs around TC = 300 K and a large magnetic-entropy change −ΔSM = 17.3 J/kg K detected at TC for a field change of ΔB = 5 T. The field dependence of −ΔS M max can be expressed as −ΔS M max ∝ B. At ambient temperature and pressure, Mn0.92Fe0.08CoGe exhibits a co-existence of the orthorhombic TiNiSi-type structure (space group Pnma) and hexagonal Ni 2In-type structure (space group P63/mmc). Application of external pressure drives a structure change from the orthorhombic TiNiSi-type structure to the hexagonal Ni 2In-type structure. A large anomaly in heat capacity around TC is detected and the Debye temperature θD (=319(±10) K) has been derived from analyses of the low temperature heat capacity, T ≲ 10 K.

Authors


  •   Wang, Jian Li.
  •   Shamba, Precious (external author)
  •   Hutchison, Wayne D. (external author)
  •   Gu, Qinfen (external author)
  •   Md Din, M F. (external author)
  •   Ren, Qing Yon (external author)
  •   Cheng, Zhenxiang
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2015

Citation


  • Wang, J. L., Shamba, P., Hutchison, W. D., Gu, Q. F., Md Din, M. F., Ren, Q. Y., Cheng, Z. X., Kennedy, S. J., Campbell, S. J. & Dou, S. X. (2015). Magnetocaloric effect and magnetostructural coupling in Mn0.92Fe0.08CoGe compound. Journal of Applied Physics, 117 (17), 17D103-1-17D103-4.

Scopus Eid


  • 2-s2.0-84923658977

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2356&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1355

Start Page


  • 17D103-1

End Page


  • 17D103-4

Volume


  • 117

Issue


  • 17