Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session V39: Magnetism in Rare Earth Materials
2:30 PM–4:54 PM,
Thursday, March 7, 2019
BCEC Room: 207
Sponsoring Units: GMAG DMP
Chair: Rebecca Dally, NIST
Abstract: V39.00009 : Optimizing the intrinsic magnetic properties of REFe12-xMxphases*
4:06 PM–4:18 PM
Two types have been studied, (Nd1-xYx)Fe12-yTiy and SmFe12-yVy, using state of the art density functional theory methods (VASP; FP LMTO RSPt). The phase stability and the magnetic properties were calculated depending on the Ti and V concentration. Aiming to reduce the RE amount the performance depending on the Nd/Y ratio was monitored.
We find that the Nd-Y (Sm) system is stable down to y = 0.5 (y=1) which leads to an increase of the magnetization by 17% compared to the commonly used concentrations of Ti (V). In viev of the MAE a replacement of Nd by Y turned out to be preferable over a reduction of Ti. MAE values of 1.3 MJ/m3 ((NdY)Fe11Ti) and 1.7 MJ/m3 (SmFe11V) are predicted. The latter could be verified in recent experiments.
*Support by NOVAMAG (EU686056) and VR (SE), STandUP (SE).
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