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Magnetic properties and magnetocaloric effect of NdMn2-xTixSi2 compounds

Journal Article


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Abstract


  • The structural and magnetic properties of the intermetallic compounds NdMn2-xTixSi2(x = 0, 0.1, 0.2, and 0.3) have been studied by x-ray and high resolution neutron powder diffraction, specific heat, dc magnetization, and differential scanning calorimetry measurements over the temperature range 3-450 K. The Curie temperature and Néel temperature of NdMn2Si2 decrease from TC = 36 K and T N = 380 K to TC = 14 K and TN = 360 K, respectively, on substitution of Ti (x = 0.3) for Mn. The magnetocaloric effect at the first order ferromagnetic phase transition at TC, has been investigated in detail. Under a change of magnetic field of 0-5 T, the maximum value of the magnetic entropy change is 27 J kg-1 K-1 at x = 0, reducing to 15.3 J kg-1 K-1 at x = 0.1 and 10 J kg-1 K-1 at x = 0.3; importantly, no thermal or field hysteresis losses occur (eliminated from 0.3 K and 28.5 J kg-1 at x = 0 around TC) with increase in Ti concentration. Combined with the lack of any hysteresis effects, these findings indicate that NdMn 1.9Ti0.1Si2 compound offers potential as a candidate for magnetic refrigerator applications in the temperature region below 35 K.

Authors


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

Publication Date


  • 2013

Citation


  • Md Din, M. F., Wang, J. L., Campbell, S. J., Zeng, R., Hutchison, W. D., Avdeev, M., Kennedy, S. J. & Dou, S. X. (2013). Magnetic properties and magnetocaloric effect of NdMn2-xTixSi2 compounds. Journal of Physics D: Applied Physics, 46 (44), 1-11.

Scopus Eid


  • 2-s2.0-84887001311

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1927&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/926

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 1

End Page


  • 11

Volume


  • 46

Issue


  • 44

Place Of Publication


  • United Kingdom

Abstract


  • The structural and magnetic properties of the intermetallic compounds NdMn2-xTixSi2(x = 0, 0.1, 0.2, and 0.3) have been studied by x-ray and high resolution neutron powder diffraction, specific heat, dc magnetization, and differential scanning calorimetry measurements over the temperature range 3-450 K. The Curie temperature and Néel temperature of NdMn2Si2 decrease from TC = 36 K and T N = 380 K to TC = 14 K and TN = 360 K, respectively, on substitution of Ti (x = 0.3) for Mn. The magnetocaloric effect at the first order ferromagnetic phase transition at TC, has been investigated in detail. Under a change of magnetic field of 0-5 T, the maximum value of the magnetic entropy change is 27 J kg-1 K-1 at x = 0, reducing to 15.3 J kg-1 K-1 at x = 0.1 and 10 J kg-1 K-1 at x = 0.3; importantly, no thermal or field hysteresis losses occur (eliminated from 0.3 K and 28.5 J kg-1 at x = 0 around TC) with increase in Ti concentration. Combined with the lack of any hysteresis effects, these findings indicate that NdMn 1.9Ti0.1Si2 compound offers potential as a candidate for magnetic refrigerator applications in the temperature region below 35 K.

Authors


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

Publication Date


  • 2013

Citation


  • Md Din, M. F., Wang, J. L., Campbell, S. J., Zeng, R., Hutchison, W. D., Avdeev, M., Kennedy, S. J. & Dou, S. X. (2013). Magnetic properties and magnetocaloric effect of NdMn2-xTixSi2 compounds. Journal of Physics D: Applied Physics, 46 (44), 1-11.

Scopus Eid


  • 2-s2.0-84887001311

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1927&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/926

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 1

End Page


  • 11

Volume


  • 46

Issue


  • 44

Place Of Publication


  • United Kingdom