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Type: Artigo
Title: Robust ferromagnetism in the compressed permanent magnet Sm2Co17
Author: Jeffries, J. R.
Veiga, L. S. I.
Fabbris, G.
Haskel, D.
Huang, P.
Butch, N. P.
McCall, S. K.
Holliday, K.
Jenei, Z.
Xiao, Y.
Chow, P.
Abstract: The compound Sm2CO17 displays magnetic properties amenable to permanent magnet applications owing to both the 3d electrons of Co and the 4f electrons of Sm. The long-standing description of the magnetic interactions between the Sm and Co ions implies a truly ferromagnetic configuration, but some recent calculations challenge this axiom, suggesting at least a propensity for ferrimagnetic behavior. We have used high-pressure synchrotron x-ray techniques to characterize the magnetic and structural properties of Sm2Co17 to reveal a robust ferromagnetic state. The local Sm moment is at most weakly affected by compression, and the ordered moments show a surprising resilience to volumetric compressions of nearly 20%. Density functional theory calculations echo the magnetic robustness of Sm2Co17.
Subject: Estrutura de cristal
Teoria do funcional de densidade
Dinâmica molecular
Crystal structure
Density functional theory
Molecular dynamics
Country: Estados Unidos
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.90.104408
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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