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Direct evidence of Ni magnetic moment in TbNi2Mn—X-ray magnetic circular dichroism

Journal Article


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Abstract


  • We have investigated the individual magnetic moments of Ni, Mn and Tb atoms in the intermetallic compound TbNi2Mn in the Laves phase (magnetic phase transition temperature TC ∼131 K) by X-ray magnetic circular dichroism (XMCD) studies at 300 K, 80 K and 20 K. Analyses of the experimental results reveal that Ni atoms at 20 K in an applied magnetic field of 1 T carry an intrinsic magnetic moment of spin and orbital magnetic moment contributions 0.53±0.01 μB and 0.05±0.01 μB, respectively. These moment values are similar to those of the maximum saturated moment of Ni element. A very small magnetic moment of order <0.1 μB has been measured for Mn. This suggests that Mn is antiferromagnetically ordered across the two nearly equally occupied sites of 16d and 8a. A magnetic moment of up to ∼0.3 μB has been observed for the Tb atoms. Identification of a magnetic moment on the Ni atoms has provided further evidence for the mechanism of enhancement of the magnetic phase transition temperature in TbNi2Mn compared with TbNi 2 (TC∼37.5 K) and TbMn2 (T C∼54 K) due to rare earth-transition metal (R-T) and transition metal-transition metal (T-T) interactions. The behaviour of the X-ray magnetic circular dichroism spectra of TbNi2Mn at 300 K, 80 K and 20 K - above and below the magnetic ordering temperature TC ∼131 K - is discussed.

Authors


  •   Yu, D H. (external author)
  •   Huang, Mengjie (external author)
  •   Wang, Jian Li.
  •   Su, Hui-Chia (external author)
  •   Lin, Hongji (external author)
  •   Chen, Chien-Te (external author)
  •   Campbell, Stewart J. (external author)

Publication Date


  • 2014

Citation


  • Yu, D., Huang, M., Wang, J. L., Su, H., Lin, H., Chen, C. & Campbell, S. J. (2014). Direct evidence of Ni magnetic moment in TbNi2Mn—X-ray magnetic circular dichroism. Journal of Magnetism and Magnetic Materials, 370 32-36.

Scopus Eid


  • 2-s2.0-84904170755

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2149&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1148

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 32

End Page


  • 36

Volume


  • 370

Place Of Publication


  • Netherlands

Abstract


  • We have investigated the individual magnetic moments of Ni, Mn and Tb atoms in the intermetallic compound TbNi2Mn in the Laves phase (magnetic phase transition temperature TC ∼131 K) by X-ray magnetic circular dichroism (XMCD) studies at 300 K, 80 K and 20 K. Analyses of the experimental results reveal that Ni atoms at 20 K in an applied magnetic field of 1 T carry an intrinsic magnetic moment of spin and orbital magnetic moment contributions 0.53±0.01 μB and 0.05±0.01 μB, respectively. These moment values are similar to those of the maximum saturated moment of Ni element. A very small magnetic moment of order <0.1 μB has been measured for Mn. This suggests that Mn is antiferromagnetically ordered across the two nearly equally occupied sites of 16d and 8a. A magnetic moment of up to ∼0.3 μB has been observed for the Tb atoms. Identification of a magnetic moment on the Ni atoms has provided further evidence for the mechanism of enhancement of the magnetic phase transition temperature in TbNi2Mn compared with TbNi 2 (TC∼37.5 K) and TbMn2 (T C∼54 K) due to rare earth-transition metal (R-T) and transition metal-transition metal (T-T) interactions. The behaviour of the X-ray magnetic circular dichroism spectra of TbNi2Mn at 300 K, 80 K and 20 K - above and below the magnetic ordering temperature TC ∼131 K - is discussed.

Authors


  •   Yu, D H. (external author)
  •   Huang, Mengjie (external author)
  •   Wang, Jian Li.
  •   Su, Hui-Chia (external author)
  •   Lin, Hongji (external author)
  •   Chen, Chien-Te (external author)
  •   Campbell, Stewart J. (external author)

Publication Date


  • 2014

Citation


  • Yu, D., Huang, M., Wang, J. L., Su, H., Lin, H., Chen, C. & Campbell, S. J. (2014). Direct evidence of Ni magnetic moment in TbNi2Mn—X-ray magnetic circular dichroism. Journal of Magnetism and Magnetic Materials, 370 32-36.

Scopus Eid


  • 2-s2.0-84904170755

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2149&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1148

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 32

End Page


  • 36

Volume


  • 370

Place Of Publication


  • Netherlands