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Investigation and impact of the uniaxial anisotropy formation on the magnetisation dynamics in Fe-Co-Zr-N nanocomposite films for temperature sensor applications

Seemann, Klaus ORCID iD icon; Beirle, Stefan; Leiste, Harald


Soft ferromagnetic films with an in-plane uniaxial anisotropy are not merely candidates for micro inductors, transformers noise absorbers or settling EMS problems. They can also be used as a sensor material because they exhibit remarkable property changes if they are exposed to stress and/or temperature [1-2]. One application focuses the control of cutting tools in the metal working industry.
In the present work, Fe40Co37Zr11N12 nanocomposite films were exemplarily deposited on Si-substrates by r.f. magnetron sputtering, in order to investigate their static magnetisation and dynamic magnetic properties on the dependence of the field annealing process, i.e., their formation of the uniaxial anisotropy. The films show a saturation magnetisation of approximately 1.4 T. The annealing process was carried out at different temperatures and annealing time duration. This uniaxial anisotropy influences the low- and high-frequency behaviour regarding the resonance or cut-off frequency and full width of half maximum of the permeability spectrum. As a result, the annealing process shows that a uniaxial anisotropy field µ0.Hu of around 7 mT could be reached, even at 250 °C and 300 °C after an annealing time of about 6000 s. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Vortrag
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-630194
KITopen-ID: 1000063019
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Veranstaltung 11th European Magnetic Sensors and Actuators Conference (EMSA), Turin, Italy, 12.-15. Juli 2016
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