Correlating structure with ferromagnetism in melt-spun Gd100−xFex

Autor:	J. Goertzen, Andrew Meyer, Matthew J. Kramer, T. M. Pekarek, Geoffrey Rojas, David Schmitter, Paul Shand, Diandra Leslie-Pelecky, Jeffrey E. Shield
Rok vydání:	2011
Předmět:	Diffraction Crystallography Materials science Ferromagnetism Mechanics of Materials Transmission electron microscopy Mechanical Engineering Phase (matter) Materials Chemistry Metals and Alloys Coercivity Nanocrystalline material Amorphous solid
Zdroj:	Journal of Alloys and Compounds. 509:3000-3005
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2010.11.185
Popis:	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 G d 1 − x e f f F e x e f f phase, where xeff > 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f9a5479917110d6cd4816e3c5f601a3 https://doi.org/10.1016/j.jallcom.2010.11.185 Zobrazit plný text záznamu Full Text from ScienceDirect