Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect

Wenbo Mi, Haili Bai, Qiang Zhang, Bei Zhang, Xixiang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Cu0.96Fe0.04O1-δ nanocrystalline films were fabricated using reactive sputtering at different oxygen partial pressures (PO2). The electrical transport properties of the films were measured in a broad temperature range (10-300 K) under magnetic fields of up to 5T. Anomalous Hall effect (AHE) of up to 0.4μΩ cm was observed at 10 K and decreased to 0.2μΩ cm at 300 K. The characteristic AHE clearly indicated the existence of ferromagnetism in these materials. The AHE weakened as PO2 increased because the increasing PO2 reduced the fraction of Fe2+ ions, and consequently weakened the double exchange coupling between Fe2+-O2--Cu2+ in the materials.

Original languageEnglish (US)
Article number043001
JournalApplied Physics Express
Volume4
Issue number4
DOIs
StatePublished - Apr 2011

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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