High resolution neutron powder diffraction studies of manganese-and chromium-substituted Y2Fe14B compounds reveal the presence of a substantial preferential site occupation of manganese and chromium on the six non-equivalent transition metal sites. In particular, the 8j2 site is found to be well populated by manganese and chromium atoms. The observed distribution of magnetization in manganese-substituted compounds suggests marked local environmental effects and a substantial contribution of manganese to the site magnetization. A ferromagnetic coupling at the 8j2 site and a more complex situation at the other sites is suggested. An even more enhanced local environmental effect on the distribution of the magnetization is observed in chromium-substituted compounds.
Magnetic Structure and Preferential Site Occupation in Mn and Cr substituted Y2Fe14B Compounds / O. Moze; L. Pareti; M. Solzi; F. Bolzoni; W.I.F. David ; W.T.A. Harrison; A. Hewat. - In: JOURNAL OF THE LESS-COMMON METALS. - ISSN 0022-5088. - 136(1988), pp. 375-383. [10.1016/0022-5088(88)90440-7]
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