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- Title
LaSrMnO thin films on SrTiO and CaTiO buffered Si substrates: structural, static, and dynamic magnetic properties.
- Authors
Belmeguenai, M.; Mercone, S.; Adamo, C.; Chauveau, T.; Méchin, L.; Monod, P.; Moch, P.; Schlom, D.
- Abstract
Nearly 50-nm thick LaSrMnO (LSMO) films were grown on Si substrates using molecular beam epitaxy on (001) Si substrates over-layered by a 20 nm thick SrTiO (STO) or by a 20 nm thick CaTiO (CTO) film. In addition, a reference LSMO film was directly deposited on a (001) STO substrate by pulsed laser deposition. For all the samples, X-ray diffraction revealed an excellent epitaxy of the LSMO film and small mosaicity around (001), with in-plane [100] and [010] cubic axes. The LSMO/CTO films are in-plane compressed while the LSMO/STO ones are in-plane extended. The temperature dependence of their static magnetic properties was studied using a SQUID, showing a Curie temperature overpassing 315 K for all the samples. Hysteresis loops performed at room temperature (294 K) with the help of a vibrating sample magnetometer (VSM) are also discussed. At 294 K Micro-strip ferromagnetic resonance (MS-FMR) was used to investigate the dynamic magnetic properties. It allows concluding to a strong anisotropy perpendicular to the films and to a weak fourfold in-plane anisotropy with easy axes along the [110] and [ $$ 1\bar{1}0 $$] directions. Their values strongly depend on the studied sample and are presumably related to the strains suffered by the films.
- Subjects
MAGNETIC properties of metallic films; LANTHANUM compounds; SUBSTRATES (Materials science); MOLECULAR beam epitaxy; MANGANITE; ANISOTROPY; FERROMAGNETIC resonance; NANOCOMPOSITE materials
- Publication
Journal of Nanoparticle Research, 2011, Vol 13, Issue 11, p5669
- ISSN
1388-0764
- Publication type
Article
- DOI
10.1007/s11051-011-0334-y