Skip to main content
placeholder image

Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds

Journal Article


Download full-text (Open Access)

Abstract


  • Structural and magnetic properties of NdMn2−x Cu xSi2 compounds (x = 0–1.0) have been investigated by high intensity x-ray and resolution neutron diffraction (3–450 K), specific heat, dc magnetization, and differential scanning calorimetry measurements. Substitution of Cu for Mn leads to an increase in the lattice parameter a but a decrease in c at room temperature. Two magnetic phase transitions have been found for NdMn2−x Cu xSi2 compounds with TN for the antiferromagnetic ordering of Mn-sublatttice and TC for the Nd-sublattice ferromagnetic ordering, respectively. TC increases significantly with increasing Cu content from 36 K at x = 0 to 100 K at x = 1.0. Moreover, it is found that the order of magnetic phase transition around TC also changes from first order at x < 0.6 to second order transition for x ≥ 0.6. The spontaneous magnetization found to decrease with the increase in Cu concentration which can be understood in the term of the dilution effect of Cu for Mn. The values of −ΔSM around TC decrease with increasing x from 27 J kg−1 K−1 for x = 0 to 0.5 J kg−1 K−1 for x = 1.0 under 0–5 T field. Refinement of neutron diffraction patterns for x = 0.2 confirms the magnetic states detected by magnetic study and also indicates that the lattice constants a and c show a distinct variation around TC.

Authors


  •   Md Din, M F. (external author)
  •   Wang, Jian Li.
  •   Avdeev, Maxim (external author)
  •   Gu, Qinfen (external author)
  •   Zeng, R (external author)
  •   Campbell, Stewart J. (external author)
  •   Kennedy, Shane J. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2014

Citation


  • Md Din, M. F., Wang, J. L., Avdeev, M., Gu, Q. F., Zeng, R., Campbell, S. J., Kennedy, S. J. & Dou, S. X. (2014). Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds. Journal of Applied Physics, 115 (17), 17A921-1-17A921-3.

Scopus Eid


  • 2-s2.0-84903879988

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2103&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1102

Start Page


  • 17A921-1

End Page


  • 17A921-3

Volume


  • 115

Issue


  • 17

Abstract


  • Structural and magnetic properties of NdMn2−x Cu xSi2 compounds (x = 0–1.0) have been investigated by high intensity x-ray and resolution neutron diffraction (3–450 K), specific heat, dc magnetization, and differential scanning calorimetry measurements. Substitution of Cu for Mn leads to an increase in the lattice parameter a but a decrease in c at room temperature. Two magnetic phase transitions have been found for NdMn2−x Cu xSi2 compounds with TN for the antiferromagnetic ordering of Mn-sublatttice and TC for the Nd-sublattice ferromagnetic ordering, respectively. TC increases significantly with increasing Cu content from 36 K at x = 0 to 100 K at x = 1.0. Moreover, it is found that the order of magnetic phase transition around TC also changes from first order at x < 0.6 to second order transition for x ≥ 0.6. The spontaneous magnetization found to decrease with the increase in Cu concentration which can be understood in the term of the dilution effect of Cu for Mn. The values of −ΔSM around TC decrease with increasing x from 27 J kg−1 K−1 for x = 0 to 0.5 J kg−1 K−1 for x = 1.0 under 0–5 T field. Refinement of neutron diffraction patterns for x = 0.2 confirms the magnetic states detected by magnetic study and also indicates that the lattice constants a and c show a distinct variation around TC.

Authors


  •   Md Din, M F. (external author)
  •   Wang, Jian Li.
  •   Avdeev, Maxim (external author)
  •   Gu, Qinfen (external author)
  •   Zeng, R (external author)
  •   Campbell, Stewart J. (external author)
  •   Kennedy, Shane J. (external author)
  •   Dou, Shi Xue

Publication Date


  • 2014

Citation


  • Md Din, M. F., Wang, J. L., Avdeev, M., Gu, Q. F., Zeng, R., Campbell, S. J., Kennedy, S. J. & Dou, S. X. (2014). Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds. Journal of Applied Physics, 115 (17), 17A921-1-17A921-3.

Scopus Eid


  • 2-s2.0-84903879988

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2103&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1102

Start Page


  • 17A921-1

End Page


  • 17A921-3

Volume


  • 115

Issue


  • 17