title: Microwave properties of ferromagnetic nanostructures.
abstract: A review of the dynamic properties of nanostructured ferromagnetic materials at microwave frequencies (1-40 GHz) is presented. Since some confusion has recently appeared between giant magnetoimpedance (GMI) and ferromagnetic resonance (FMR), a detailed analysis is made in order to establish their differences. A brief review of a novel microwave absorption mode, the low-field microwave absorption (LFA) is then presented, together with a discussion about its similarities with GMI. Recent results on high-frequency measurements on nanogranular thin films and FMR in nanowire arrays are finally addressed.
authors.affiliation: Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Coyoacán, México DF, Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Valenzuela
authors.forename: G
authors.initials: G
authors.lastname: Alvarez
authors.forename: M E
authors.initials: ME
authors.lastname: Mata-Zamora