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Phase gap in pseudoternary R1-yRy′Mn2X 2-xXx′ compounds

Journal Article


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Abstract


  • Our neutron diffraction investigation of PrMn2Ge 2-xSix reveals a clear separation into two magnetic phases, canted ferromagnetic (Fmc) and antiferromagnetic (AFmc), between x = 1.0 and 1.2 and a commensurate phase gap in the lattice, due to magnetostrictive distortion. This remarkable magnetoelastic phenomenon is driven by a nonuniform atomic distribution on the X site which in turn produces subtle variations in the local lattice and abrupt changes in the Mn-Mn magnetic exchange interaction. Our results show that coexistence of Fmc and AFmc phases depends on lattice parameter, chemical pressure from the rare-earth and metalloid sites, and local lattice strain distributions. We demonstrate that these magnetostructural correlations act across the entire family of R1-yRy′Mn 2X2-xXx′ compounds. © 2013 American Physical Society.

Authors


  •   Wang, Jian Li.
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Hofmann, Michael A. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2013

Citation


  • Wang, J. L., Kennedy, S. J., Campbell, S. J., Hofmann, M. & Dou, S. X. (2013). Phase gap in pseudoternary R1-yRy′Mn2X 2-xXx′ compounds. Physical Review B: Condensed Matter and Materials Physics, 87 (10), 104401-1-104401-5.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1598&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/598

Start Page


  • 104401-1

End Page


  • 104401-5

Volume


  • 87

Issue


  • 10

Abstract


  • Our neutron diffraction investigation of PrMn2Ge 2-xSix reveals a clear separation into two magnetic phases, canted ferromagnetic (Fmc) and antiferromagnetic (AFmc), between x = 1.0 and 1.2 and a commensurate phase gap in the lattice, due to magnetostrictive distortion. This remarkable magnetoelastic phenomenon is driven by a nonuniform atomic distribution on the X site which in turn produces subtle variations in the local lattice and abrupt changes in the Mn-Mn magnetic exchange interaction. Our results show that coexistence of Fmc and AFmc phases depends on lattice parameter, chemical pressure from the rare-earth and metalloid sites, and local lattice strain distributions. We demonstrate that these magnetostructural correlations act across the entire family of R1-yRy′Mn 2X2-xXx′ compounds. © 2013 American Physical Society.

Authors


  •   Wang, Jian Li.
  •   Kennedy, Shane J. (external author)
  •   Campbell, Stewart J. (external author)
  •   Hofmann, Michael A. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2013

Citation


  • Wang, J. L., Kennedy, S. J., Campbell, S. J., Hofmann, M. & Dou, S. X. (2013). Phase gap in pseudoternary R1-yRy′Mn2X 2-xXx′ compounds. Physical Review B: Condensed Matter and Materials Physics, 87 (10), 104401-1-104401-5.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1598&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/598

Start Page


  • 104401-1

End Page


  • 104401-5

Volume


  • 87

Issue


  • 10