Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe2O3

Jaspreet Kocher, Ashok Kumar, Ashavani Kumar, Shashank Priya, Jitendra Kumar

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report a simple, eco-friendly facile wet chemical nitrate precursor route for the synthesis of pristine and nickel-containing nanocrystalline (∼44nm) α-Fe2O3. Thermal analysis of the dried (∼70°C) presumed oxalate powder, Fe2(C2O4)3·4H2O (also confirmed by X-ray diffraction), revealed two-step formation of the oxide; slower reaction as Fe2(C2O4)3·4H2O↓→4H2O↑+2CO2↑+2FeC2O4↓ and faster as 2FeC2O4→Fe2O3↓+CO2↑+3CO↑. The incorporation of nickel resulted in progressive increase of cell parameters and exhibited decrease in estimated direct and indirect band gap values. The direct band gap values were in close correlation with emission transitions. The direct nature and narrowing of band gap with nickel addition ensures the higher absorbance values and wider spectrum of absorbance; indicating the enhanced semiconducting properties for applications such as solar cells, photocatalytic activity, etc. Regarding magnetic properties, the saturation magnetization increased progressively with nickel content while coercivity reduced up to 2wt% of Ni content and increased afterward. The resistivity values with nickel incorporation decreased, when substituted at Fe3+ sites.

Original languageEnglish (US)
Pages (from-to)1552-1557
Number of pages6
JournalPhysica Status Solidi (B) Basic Research
Volume251
Issue number8
DOIs
StatePublished - Aug 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe<sub>2</sub>O<sub>3</sub>'. Together they form a unique fingerprint.

Cite this