Large enhancement of magnetic moment in L1(0) ordered FePt thin films by Nd substitutional doping

Journal Article · Wed Jul 01 00:00:00 EDT 2015 · Journal of Physics. D, Applied Physics

DOI:https://doi.org/10.1088/0022-3727/48/25/255001· OSTI ID:1240416

Xu, D. B.; Sun, C J; Chen, J. S.; Heald, S M; Sanyal, B.; Rosenberg, R. A.; Zhou, T. J.; Chow, G. M.

We studied L1(0) ordered Fe50Pt50-xNdx alloy films, which showed a large enhancement (similar to 18.4% at room temperature and similar to 11.7% at 10 K) of magnetic moment with 6 atomic % of Nd. Analysis of the x-ray magnetic circular dichroism spectra at the Fe L-3,L-2 edges and Nd M-5,M-4 edges in Fe50Pt44Nd6 films indicated a significant contribution of the Nd orbital moment. The origin of the large enhancement of magnetic moment was attributed to the effect of ferromagnetic coupling of the total magnetic moments between Fe and Nd. Density functional theory based first principles calculations supported the experimental observations of increasing moment due to Nd substitution of Pt.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National University of Singapore; Swedish Research Council (SRC)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1240416
• Journal Information: Journal of Physics. D, Applied Physics, Vol. 48, Issue 25; ISSN 0022-3727
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

L10 FePt
magnetic moment
substitutional doping