Exploring the magnetization dynamics of NiFe/Pt multilayers in flexible substrates

• Autor(a) principal: Corrêa, Marcio Assolin
• Data de Publicação: 2016
• Outros Autores: Dutra, Roberta, Marcondes, Tatiana Lisboa, Mori, T. J. A., Bohn, Felipe, Sommer, R. L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• DOI: 10.1016/j.mseb.2016.06.008
• Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/29289
• topic: Magnetic systems; Magnetization dynamics; Magnetoimpedance effect; Ferromagnetic films

We investigate the structural and magnetic properties, and the magnetization dynamics in Ni81Fe19/Pt multilayer systems grown onto rigid and flexible substrates. The structural characterization shows evidence of a superlattice behavior, while the quasi-static magnetization characterization reveal a weak magnetic anisotropy induced in the multilayers. The magnetization dynamics is investigated through the magnetoimpedance effect. We employ a theoretical approach to describe the experimental magnetoimpedance effect and verify the influence of the effective damping parameter on the magnetization dynamics. Experimental data and theoretical results are in agreement and suggest that the multilayers present high effective damping parameter. Moreover, our experiments raise an interesting issue on the possibility of achieving considerable MI% values, even for systems with weak magnetic anisotropy and high damping parameter grown onto flexible substrates