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Magnetic transitions and the magnetocaloric effect in the Pr 1-xYxMn2Ge2 system

Journal Article


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Abstract


  • Layered rare earth compounds in the RMn2X2 series (R = rare-earth; X = Ge, Si) are of interest for potential cooling applications at lower temperatures as they enable the structural and magnetic behavior to be controlled via substitution of R, Mn, and X atoms on the 2a, 4d, and 4e sites respectively. We continue investigations of the Pr1−xYxMn2Ge2 magnetic phase diagram as functions of both composition and Mn–Mn spacing using X-ray and neutron diffraction, magnetization and differential scanning calorimetry measurements. Pr1−xYxMn2Ge2 exhibits an extended region of re-entrant ferromagnetism around x ∼ 0.5 with re-entrant ferromagnetism at inline image for Pr0.5Y0.5Mn2Ge2. The entropy values −ΔSM around the ferromagnetic transition temperatures inline image from the layered antiferromagnetic AFl structure to the canted ferromagnetic structure Fmc (typically inline image) have been derived for Pr1−xYxMn2Ge2 with x = 0.0, 0.2, and 0.5 for ΔB = 0–5 T. The changes in magnetic states due to Y substitution for Pr are discussed in terms of chemical pressure, external pressure, and electronic effects.

Authors


  •   Wang, Jian Li.
  •   Campbell, Stewart J. (external author)
  •   Md Din, M F. (external author)
  •   Kennedy, Shane J. (external author)
  •   Hofmann, Michael A. (external author)

Publication Date


  • 2014

Citation


  • Wang, J. L., Campbell, S. J., Md Din, M. F., Kennedy, S. J. & Hofmann, M. (2014). Magnetic transitions and the magnetocaloric effect in the Pr 1-xYxMn2Ge2 system. Physica Status Solidi A: Applications and Materials Science, 211 (5), 1092-1100.

Scopus Eid


  • 2-s2.0-84900857225

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2084&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1083

Number Of Pages


  • 8

Start Page


  • 1092

End Page


  • 1100

Volume


  • 211

Issue


  • 5

Abstract


  • Layered rare earth compounds in the RMn2X2 series (R = rare-earth; X = Ge, Si) are of interest for potential cooling applications at lower temperatures as they enable the structural and magnetic behavior to be controlled via substitution of R, Mn, and X atoms on the 2a, 4d, and 4e sites respectively. We continue investigations of the Pr1−xYxMn2Ge2 magnetic phase diagram as functions of both composition and Mn–Mn spacing using X-ray and neutron diffraction, magnetization and differential scanning calorimetry measurements. Pr1−xYxMn2Ge2 exhibits an extended region of re-entrant ferromagnetism around x ∼ 0.5 with re-entrant ferromagnetism at inline image for Pr0.5Y0.5Mn2Ge2. The entropy values −ΔSM around the ferromagnetic transition temperatures inline image from the layered antiferromagnetic AFl structure to the canted ferromagnetic structure Fmc (typically inline image) have been derived for Pr1−xYxMn2Ge2 with x = 0.0, 0.2, and 0.5 for ΔB = 0–5 T. The changes in magnetic states due to Y substitution for Pr are discussed in terms of chemical pressure, external pressure, and electronic effects.

Authors


  •   Wang, Jian Li.
  •   Campbell, Stewart J. (external author)
  •   Md Din, M F. (external author)
  •   Kennedy, Shane J. (external author)
  •   Hofmann, Michael A. (external author)

Publication Date


  • 2014

Citation


  • Wang, J. L., Campbell, S. J., Md Din, M. F., Kennedy, S. J. & Hofmann, M. (2014). Magnetic transitions and the magnetocaloric effect in the Pr 1-xYxMn2Ge2 system. Physica Status Solidi A: Applications and Materials Science, 211 (5), 1092-1100.

Scopus Eid


  • 2-s2.0-84900857225

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2084&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1083

Number Of Pages


  • 8

Start Page


  • 1092

End Page


  • 1100

Volume


  • 211

Issue


  • 5