Robust Ferromagnetism in the Compressed Permanent Magnet Sm2Co17

Published

September 8, 2014

Author(s)

Jason R. Jeffries, L.S.I. Veiga, G. Fabbris, D. Haskel, P. Huang, Nicholas Butch, S.K. McCall, K. Holliday, Z. Jenei, Y. Xiao, P. Chow

Abstract

The compound Sm₂Co_{17 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 Sm}d2^Co₁₇ 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.

Citation

Physical Review B

Volume

90

Issue

10

Pub Type

Journals

Download Paper

Local Download

Keywords

magnet, x-ray, pressure

Citation

Jeffries, J. , Veiga, L. , Fabbris, G. , Haskel, D. , Huang, P. , Butch, N. , McCall, S. , Holliday, K. , Jenei, Z. , Xiao, Y. and Chow, P. (2014), Robust Ferromagnetism in the Compressed Permanent Magnet Sm₂Co₁₇, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=915707 (Accessed May 18, 2024)