Abstract
Bi0.95Y0.05FeO3 nanocrystals are synthesized by a hydrothermal method, and are crystallized in a rhombohedrally distorted perovskite BiFeO3 structure in the R3c space, with compressive lattice distortion induced by the Y substitution at Bi sites from XRD study. Compared with BiFeO3 gained under similar conditions, the magnetic properties are greatly enhanced, with saturate magnetization of 2.3emu/g at room temperature. Microwave dielectric properties of Bi 0.95Y0.05FeO3 nanocrystals are investigated in the range of 2-18 GHz. The Y substitution results in the increase of permeability and decrease of permittivity, which are attributed to the enhanced spin relaxation of domain wall motion and the weakened electron-relaxation caused by decreasing Fe2+, respectively. The changes for microwave dielectric response could lead to the excellent microwave absorption due to the improvement of the impedance match between BiFeO3 and air.
Original language | English |
---|---|
Article number | 037702 |
Journal | Chinese Physics Letters |
Volume | 28 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2011 |