Faculty Publications

Title

Correlating structure with ferromagnetism in melt-spun Gd 100-xFex

Document Type

Article

Keywords

Coercivity, Ferromagnetism, Gadolinium-iron alloy, Nanocrystalline

Journal/Book/Conference Title

Journal of Alloys and Compounds

Volume

509

Issue

6

First Page

3000

Last Page

3005

Abstract

X-ray diffraction and transmission electron microscopy measurements of melt-spun Gd100-xFex (0 x 40) and inert-gas condensed/compacted samples (3.8 x 12.7) reveal a structure of crystalline hcp-Gd grains surrounded by a non-crystalline Gd1-xeffFexeff phase, where x eff > x is the effective iron concentration within the amorphous region. The two-phase structure is responsible for an unusual dependence of the coercivity on temperature in which non-zero coercivity is observed above the hcp-Gd Tc with a peak near 320 K. The coercivity decreases as the hcp-Gd grains order, then increases with decreasing temperature. This behavior is explained by the presence of magnetically correlated Fe-rich regions. © 2010 Elsevier B.V. All rights reserved.

Original Publication Date

2-10-2011

DOI of published version

10.1016/j.jallcom.2010.11.185

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