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Physical properties of sputtered CrFeCoNiCu thin films on quartz substrate

Physical properties of sputtered CrFeCoNiCu thin films on quartz substrate

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Sammendrag
Equiatomic high entropy alloys (HEA) have attracted considerable interest due to their exceptional properties, which might be closely related to their extreme disorder induced by chemical complexity. We have sputtered thin films of CrFeCoNiCu onto insulating and optically transparent substrates in order to measure electrical and optical functional properties. After several optimizations desired sputtering conditions were obtained for the deposition of CrFeCoNiCu onto fused quartz wafers. All the samples were characterized by structural, chemical and electrical methods. The as prepared films had fcc-type structure. Hall measurements were performed from 10 K to 600K. The resistivity was a factor 104 higher than the elemental metals and the temperature dependence was different. The sign of the Hall coefficient indicates that the film was dominated by holes, while the Seebeck coefficient was negative and dominated by electrons. The electric properties will be discussed in terms of a model considering electronic structure and scattering.

Oppdragsgiver
  • Research Council of Norway (RCN) / 275752
  • Research Council of Norway (RCN) / 245963
Språk
Engelsk
Institusjon(er)
  • Universitetet i Oslo
  • SINTEF Industri / Bærekraftig energiteknologi
  • Ukjent
Presentert på
World Congress on High Entropy Alloys (HEA 2019)
Sted
Seattle, Washington, USA
Dato
17.11.2019 - 20.11.2019
Arrangør
TMS
År