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Neutron diffraction study of MnNiGa2 - Structural and magnetic behaviour

Journal Article


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Abstract


  • MnNiGa2 crystallizes in the L21 (Heusler) structure and has a ferromagnetic ordering temperature TC ∼ 192 K. Rietveld refinement of the neutron diffraction patterns indicates that the Ga atoms occupy the equivalent 8c position, while Mn and Ni share the 4a (0, 0, 0) and 4b (0.5, 0.5, 0.5) sites with a mixed occupancy of Mn and Ni atoms. It is found that that ∼83% of Mn and ∼17% Ni are located at the 4a site while ∼83% of Ni and ∼17% Mn occupy the 4b site. There is no evidence of a magneto-volume effect around TC. In agreement with this finding, our detailed critical exponent analyses of isothermal magnetization curves and the related Arrott plots confirm that the magnetic phase transition at TC is second order.

Authors


  •   Wang, Jian Li.
  •   Ma, L (external author)
  •   Hofmann, Michael A. (external author)
  •   Avdeev, Maxim (external author)
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Md Din, M F. (external author)
  •   Hoelzel, Markus (external author)
  •   Wu, Guangheng (external author)
  •   Dou, Shi Xue

Publication Date


  • 2014

Citation


  • Wang, J. L., Ma, L., Hofmann, M., Avdeev, M., Kennedy, S. J., Campbell, S. J., Md Din, M. F., Hoelzel, M., Wu, G. H. & Dou, S. X. (2014). Neutron diffraction study of MnNiGa2 - Structural and magnetic behaviour. Journal of Applied Physics, 115 (17), 17A904-1-17A904-3.

Scopus Eid


  • 2-s2.0-84893121671

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2001&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1000

Has Global Citation Frequency


Start Page


  • 17A904-1

End Page


  • 17A904-3

Volume


  • 115

Issue


  • 17

Place Of Publication


  • United States

Abstract


  • MnNiGa2 crystallizes in the L21 (Heusler) structure and has a ferromagnetic ordering temperature TC ∼ 192 K. Rietveld refinement of the neutron diffraction patterns indicates that the Ga atoms occupy the equivalent 8c position, while Mn and Ni share the 4a (0, 0, 0) and 4b (0.5, 0.5, 0.5) sites with a mixed occupancy of Mn and Ni atoms. It is found that that ∼83% of Mn and ∼17% Ni are located at the 4a site while ∼83% of Ni and ∼17% Mn occupy the 4b site. There is no evidence of a magneto-volume effect around TC. In agreement with this finding, our detailed critical exponent analyses of isothermal magnetization curves and the related Arrott plots confirm that the magnetic phase transition at TC is second order.

Authors


  •   Wang, Jian Li.
  •   Ma, L (external author)
  •   Hofmann, Michael A. (external author)
  •   Avdeev, Maxim (external author)
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Md Din, M F. (external author)
  •   Hoelzel, Markus (external author)
  •   Wu, Guangheng (external author)
  •   Dou, Shi Xue

Publication Date


  • 2014

Citation


  • Wang, J. L., Ma, L., Hofmann, M., Avdeev, M., Kennedy, S. J., Campbell, S. J., Md Din, M. F., Hoelzel, M., Wu, G. H. & Dou, S. X. (2014). Neutron diffraction study of MnNiGa2 - Structural and magnetic behaviour. Journal of Applied Physics, 115 (17), 17A904-1-17A904-3.

Scopus Eid


  • 2-s2.0-84893121671

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2001&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1000

Has Global Citation Frequency


Start Page


  • 17A904-1

End Page


  • 17A904-3

Volume


  • 115

Issue


  • 17

Place Of Publication


  • United States