Abstract
The effect of partial Fe substitution by Be on structure and magneticproperties has been studied across the R2Fe17-xBex series, whereR = Y, Pr, Nd, Sm, Gd, Tb and Dy. On Be substitution, the Th2Zn17 typerhombohedral structure is stabilized across the series, even for R = Dy and Tbwhich stabilize in the Th2Ni17 type hexagonal structure without Besubstitution. Depending on the R element, one or more Be atoms (up to five)per formula unit can be retained in the Th2Zn17 type structure. Thelattice parameters, magnetic ordering temperature and saturation magneticmoment decrease upon Be substitution. The easy magnetization direction of thesamples with a higher magnetic ordering temperature is still within the basalc plane. The variation of magnetic properties is discussed in correlationwith volume effects, dilution effects and electron hybridization.
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