Magnetic coupling in Gd(Fe6−x
Cr
x
)Al6: A57Fe Mössbauer study |
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| Authors: | Hong-Shuo Li J M Cadogan Xiao-Li Zhao S J Campbell |
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| Institution: | (1) School of Physics, The University of New South Wales, 2052 Sydney, NSW, Australia;(2) Department of Physics, University College, The University of New South Wales, 2600 Canberra, ACT, Australia |
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| Abstract: | 57Fe Mössbauer measurements have been made on the ternary ThMn12-type intermetallic compounds Gd(Fe6–x
Cr
x
)Al6 withx=0, 0.5, 1.0, 1.5 and 2.0, at temperatures of 4.2 and 77 K. The principal effect of the Cr substitution is to reduce the57Fe magnetic hyperfine field at 4.2 K in this series. The analysis of the57Fe Mössbauer spectra is consistent with a ferromagnetic coupling between the Gd and Cr magnetic moments. These results are in agreement with previous studies by Felner et al. on GdCr6Al6, in which a ferromagnetic ordering withT
C=170 K was observed.On leave from Applied Acoustics Institute, Shaanxi Teachers University, Xian, PR China. |
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