Abstract

The magnetic structures of a series of Y2(Fe 1-xMnx)14B samples, with x equal to 0.03, 0.10, 0.25, and 0.37, have been studied by powder neutron diffraction and Mössbauer spectroscopy. Y2(Fe0.97Mn 0.03)14B and Y2(Fe0.9Mn 0.1)14B are ferromagnetic at both 295 and 85 K, Y 2(Fe0.63Mn0.37)14B is paramagnetic at both 295 and 85 K, whereas Y2(Fe0.75Mn 0.25)14B is paramagnetic at 295 K and is partially ordered at 78 K. The magnetic structure of Y2(Fe0.75Mn 0.25)14B is explained in terms of the preferential Mn occupancy of the transition metal 8j2 site in the Y 2Fe14B structure. Small amounts of Mn located in this site are very effective in disrupting the long-range ferromagnetic coupling.

Department(s)

Physics

Second Department

Chemistry

International Standard Serial Number (ISSN)

0021-8979

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1991 American Institute of Physics Publishing LLC, All rights reserved.

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