Bulk versus surface effects in magnetic thin films obtained by pulsed laser deposition

• Published in: Applied surface science Vol. 217; no. 1; pp. 233 - 238
• Main Authors: Sorescu, Monica, Grabias, A, Tarabasanu-Mihaila, D, Diamandescu, L
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15-07-2003; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Iron oxides; Magnetic properties and materials; Magnetic properties of monolayers and thin films; Magnetic properties of surface, thin films and multilayers; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mossbauer effect; other γ-ray spectroscopy; Mössbauer effect; other γ-ray spectroscopy; Mössbauer spectroscopy; Physics; Polycrystalline surfaces; Polycrystalline thin films; Polycrystalline thin films; Iron oxides; Polycrystalline surfaces; 76.80; Mössbauer spectroscopy; Hyperfine magnetic field; Intermetallic compounds; 76.80+ Mössbauer spectroscopy; Doped materials; Moessbauer spectroscopy; Chromium additions; Pulsed laser deposition; XRD; Texture; Magnetic thin films; Bulk material; Cobalt additions; Comparative study
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/S0169-4332(03)00536-1

In this paper we present a direct comparison between the properties of bulk magnetic systems and those of corresponding thin films obtained by pulsed laser deposition. These are Fe
50Co
50, Fe
3O
4, Fe
3O
4:Co and Fe
2O
3:Cr. Using X-ray diffraction, transmission and conversion electron Mössbauer spectroscopy, we present results on the bulk and surface hyperfine magnetic fields, site populations and magnetic texture. Our results support an increase in the hyperfine field values at surfaces, a more pronounced out-of-plane magnetic texture in the films, as well as a perfect transfer of stoichiometry and substitution level from target to substrate materials.