Structural and magnetic properties of sol-gel derived NiFe 2O4 thin films on silicon substrates

Safoura Seifikar, Thomas Rawdanowicz, Weston Straka, Christopher Quintero, Nazanin Bassiri-Gharb, Justin Schwartz

Research output: Contribution to journalArticle

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Abstract

Spinel NiFe2O4 thin films are derived via chemical solution deposition on silicon substrates. The films show a granular microstructure with surface roughness of less than 3 nm. The effects of varying the pyrolysis and annealing conditions on the microstructure and resulting magnetic properties have been studied. Microstructural studies confirm the formation of randomly oriented, phase-pure spinel nickel ferrite for pyrolysis at 100 °C to 500 °C and crystallization at 650 °C to 900 °C for 10 to 30 min. It is shown that the pyrolysis temperature does not affect the microstructure and the resulting magnetic properties, while increasing annealing temperature results in increased grain size and saturation magnetization. Transmission electron microcopy shows that no intermediate or secondary phase has formed at the interface even at annealing temperature as high as 900 °C.

Original languageEnglish (US)
Pages (from-to)255-261
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume361
DOIs
StatePublished - Jun 2014

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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