Abstract
Thin films of produced by pulsed-laser deposition on sapphire, yttria-stabilized zirconia, or silicon substrates show ferromagnetic magnetization curves with little hysteresis and extrapolated Curie temperatures far in excess of . The moment does not scale with film thickness, but in terms of substrate area it is typically in the range . The magnetization exhibits a remarkable anisotropy, which depends on texture and substrate orientation. Pure powder develops a weak magnetic moment on heating in vacuum, which is eliminated on annealing in oxygen. Lattice defects are the likely source of the magnetism.
- Received 13 August 2004
DOI:https://doi.org/10.1103/PhysRevB.72.024450
©2005 American Physical Society