Back to Search
Start Over
Synthesis and Magnetic Properties of Nanocrystalline FeTiO3 Materials.
- Source :
- Journal of Superconductivity & Novel Magnetism; Apr2018, Vol. 31 Issue 4, p1189-1197, 9p
- Publication Year :
- 2018
-
Abstract
- Ilmenite (FeTiO<subscript>3</subscript>) nanoparticles with different size distributions were prepared through a sol-gel auto-ignition method. As-prepared powder is annealed at moderate temperatures to get nanocrystalline FeTiO<subscript>3</subscript>, and structural, micro-structural, and magnetization characterizations are carried out. Magnetization vs temperature shows antiferromagnetic ordering around 52 K and below 15 K a weak ferromagnetic order develops. The Curie-Weiss law is well obeyed above the Néel temperature (<italic>T</italic><subscript>N</subscript>) for all samples. Hysteresis curves show finite coercivity below the peak temperature and none at room temperature. <italic>M</italic>-<italic>H</italic> curves for all the samples cooled with a bias magnetic field show exchange bias below <italic>T</italic><subscript>N</subscript> which is interpreted due to the finite size and surface effects. The exchange bias is attributed to weak ferromagnetism due to surface spin disorder (Dzyaloshinskii-Moriya interaction) and ferromagnetic interaction (double exchange) due to mixed valence states of Fe ions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15571939
- Volume :
- 31
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Superconductivity & Novel Magnetism
- Publication Type :
- Academic Journal
- Accession number :
- 128420638
- Full Text :
- https://doi.org/10.1007/s10948-017-4278-z