Structural and magnetic properties of R sub 2 Fe sub 17-x Be sub x compounds with R=Y, Pr, Nd, Sm, Gd, Tb and Dy

The effect of partial Fe substitution by Be on structure and magnetic properties has been studied across the R sub 2 Fe sub 17-x Be sub x series, where R=Y, Pr, Nd, Sm, Gd, Tb and Dy. On Be substitution, the Th sub 2 Zn sub 17 type rhombohedral structure is stabilized across the series, even for R=D...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2000-11, Vol.12 (46), p.9657-9666
Main Authors: Mohanty, R. C.,-, Zhang, C, Shaheen, S A, Murugaiah, A, Raman, A, Grenier, C G, Ferrell, R E
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of partial Fe substitution by Be on structure and magnetic properties has been studied across the R sub 2 Fe sub 17-x Be sub x series, where R=Y, Pr, Nd, Sm, Gd, Tb and Dy. On Be substitution, the Th sub 2 Zn sub 17 type rhombohedral structure is stabilized across the series, even for R=Dy and Tb which stabilize in the Th sub 2 Ni sub 17 type hexagonal structure without Be substitution. Depending on the R element, one or more Be atoms (up to five) per formula unit can be retained in the Th sub 2 Zn sub 17 type structure. The lattice parameters, magnetic ordering temperature and saturation magnetic moment decrease upon Be substitution. The easy magnetization direction of the samples with a higher magnetic ordering temperature is still within the basal c plane. The variation of magnetic properties is discussed in correlation with volume effects, dilution effects and electron hybridization.
ISSN:0953-8984