Sol-gel combustion synthesis and antiferromagnetic properties of orthorhombic perovskite-type MFeO3:R3+ (M=La, Gd; R=Eu, Er, Ho) nanocrystalline powders
Abstract
The MFeO3: R3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders were successfully synthesized by the sol-gel combustion method using glycine-based gel at a low ignition temperature. The as-burnt products present honeycomb-like structure with many irregular continuous pores due to the releasing of a large amount of gas during the combustion reaction process. The lattice parameters and cell volumes of MFeO3:R3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders are compared in detail. The magnetic properties of all the samples were studied systematically. The results show that the doping of rare-earth ions enhanced greatly the coercivity of GdFeO3 and LaFeO3 as a result of the enhancement of magnetic anisotropy. The influence of doped rare-earth ions on the magnetic properties was summarized. The distinction of magnetism of MFeO3:R3+ (M = La, Gd; R = Eu, Er, Ho) were explained in detail by the intrinsic magnetism of doped rare-earth ions. This work is significant for the application of rare-earth elements in other magnetic materials.
- Publication:
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Journal of Solid State Chemistry France
- Pub Date:
- February 2020
- DOI:
- 10.1016/j.jssc.2019.121087
- Bibcode:
- 2020JSSCh.28221087H
- Keywords:
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- Sol-gel;
- Combustion method;
- Ferrite;
- Perovskite structure;
- Magnetic property