Structural and magnetic properties of L1(0)/A1, FePt nanocomposites

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2012.08.003· OSTI ID:1211061

Giannopoulos, G; Speliotis, T; Li, WF; Hadjipanayis, G; Niarchos, D

In this work structural and magnetic properties of (L1(0)-FePt/A1-FePt) exchange coupled nanocomposites are presented. Semi spherical "dome-like" nanocomposites with L1(0) FePt isolated nanoparticles and A1 FePt (fcc) cap layers were obtained by depositing A1-FePt on type L1(0) FePt nanoparticles in order to understand the influence of the soft magnetic layer thickness on the magnetic properties of the system. Epitaxial growth is confirmed by X-ray diffraction and TEM, while the coercivity decreases dramatically for the L1(0)/A1-FePt system when the thickness of the A1-FePt cap layers is increased. This result can be used to realize ultrahigh magnetic recording media with tunable coercivity, suitable for conventional write heads. (C) 2012 Elsevier B.V. All rights reserved.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• OSTI ID: 1211061
• Journal Information: Journal of Magnetism and Magnetic Materials, Vol. 325; ISSN 0304-8853
• Country of Publication: United States
• Language: English