Magnetism research on CuMnAl, CoMnAl and CuCoMnAl alloys by KKR-CPA-LDA calculation

Lin Feng, Zhiyong Zhu, Wei Zhu, En Ke Liu, Xiao Dan Tang, Jin Feng Qian, Guang Heng Wu*, Fan Bin Meng, He Yan Liu, Hong Zhi Luo, Yang Xian Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Comparing with the experimental data, the composition dependence of atomic moment and Co-Mn exchange interaction in CuMnAl, CoMnAl and CuCoMnAl alloys have been investigated by KKR-CPA-LDA calculation. It has been found that, due to the different surrounding environments, the magnetic moment of excess Mn atom occupying Al sites is larger than that of the original Mn atoms on B sites in Cu 50 Mn 25+x Al 25-x alloys. When the Mn content increases in Co 50 Mn 25+x Al 25-x alloys, the moment of Co atom increases monotonically, while the Mn moment almost has the same value. In Cu 50-x Co x Mn 25 Al 25 alloys, it has been revealed that the moment of Co decreases resulting from the decrease of the moment of Mn atom with the substitution of Co for Cu. These results indicate that the atomic moments of Mn and Co atoms are positively related. It has also been found that the Co-Mn exchange interaction can be enhanced by increasing Mn content and its strength comes not only from the added Co but also from the contribution of Mn.

Original languageEnglish (US)
Pages (from-to)6575-6579
Number of pages5
JournalWuli Xuebao/Acta Physica Sinica
Volume59
Issue number9
StatePublished - Sep 1 2010

Keywords

  • Co-Mn exchange interaction
  • KKR-CPA-LDA calculation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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