Fabrication and characterization of cobalt microbars

Magnetic materials have been widely used in applications such as data storage, magnetic tunnel junctions and spin valve structures. In the present work, we explore the magnetic properties of various millimeter size arrays of magnetic microbars. For this study, we focused on Cobalt microbars fabricated using photolithography, thermal evaporation, sputtering and electron gun techniques. Magnetization measurements as a function of angle were performed on microbars samples which dier slightly in their dimensions. The measurements were carried out using vibrating sample magnetometry (VSM). Also, computer simulations in OOMMF were done to simulate the experimental outcomes. As results, when the applied eld was parallel to the microbars the maximum coercivity was found and decreased slightly as the eld rotated towards the perpendicular direction. It was also found a sheared hysteresis loop in three of the samples.

• Autores: Useche Reyes, Diego Hernando
• Fecha de publicación: 2017
• Institución: Universidad de los Andes
• Repositorio: Séneca: repositorio Uniandes
• Idioma: eng
• OAI Identifier: oai:repositorio.uniandes.edu.co:1992/61530
• Acceso en línea: http://hdl.handle.net/1992/61530
• Palabra clave: Magnetismo; Materiales magnéticos
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/