Abstract
The discovery of the giant magnetostriction in RFe 2 alloys was a breakthrough. However, the compounds possessing huge magnetostriction at room temperature have large magnetic anisotropy. A number of papers have reported work to reduce the anisotropy by substituting the elements in RFe 2 with other rare earth, transition metal and group III elements. In this paper, samples of Tb 0.5Dy 0.5Fe 1.95 were prepared by substituting part of the Fe by Mn and Al. The metallographic organization of these compounds, depending on Mn and Al, and the magnetization and magnetostriction of the compounds Tb 0.5Dy 0.5(Fe 0.9Mn x Al 0.1 − x ) 1.95 were studied. It is found that Al can improve the crystalline state of Tb 0.5Dy 0.5Fe 1.95, and that both Mn and Al can reduce the magnetic anisotropy.
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