Magnetic properties dependence in the thick of FePt thin films
In this paper we present a systematic study of the thickness dependence of the magnetic properties of disordered FCC-FePt thin films. Films with thicknesses between 9 nm and 94 nm were prepared by DC magnetron sputtering technique and deposited on naturally oxidized Si (100) substrates at room tempe...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2009 |
| Country: | Perú |
| Institution: | Universidad Nacional Mayor de San Marcos |
| Repository: | Revistas - Universidad Nacional Mayor de San Marcos |
| Language: | Spanish |
| OAI Identifier: | oai:revistasinvestigacion.unmsm.edu.pe:article/8711 |
| Online Access: | https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/8711 |
| Access Level: | Open access |
| Keyword: | Películas delgadas de FePt Dominios tipo stripe. FePt thin films Stripe-like domains |
| Summary: | In this paper we present a systematic study of the thickness dependence of the magnetic properties of disordered FCC-FePt thin films. Films with thicknesses between 9 nm and 94 nm were prepared by DC magnetron sputtering technique and deposited on naturally oxidized Si (100) substrates at room temperature. X ray diffraction measurements show that the films grow with a texture along the [111] direction, perpendicular to the film plane, and that they are under in-plane planar compressive stress. In-plane magnetic hysteresis loops show that there is a critical thickness of approximately 30 nm above which a significant change of the magnetic domain structure is observed. Thinner films (9 nm ≤ t ≤ 28 nm) show an in-plane uniaxial anisotropy characterized by a square hysteresis loop, while thicker films (35 nm ≤ t ≤ 94 nm) show a magnetization reversal in a two steps process, which is typical for systems that have a stripe-like magnetic domain structure. From the out-of-plane magnetic hysteresis loops it was possible to estimate a relatively weak perpendicular anisotropy, which is the origin of the change in the domain structure. |
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