Enhanced ferromagnetism and microwave dielectric properties of Bi 0.95Y0.05FeO3 nanocrystals

Zhi Ling Hou*, Hai Feng Zhou, Jie Yuan, Yu Qing Kang, Hui Jing Yang, Hai Bo Jin, Mao Sheng Cao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

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 languageEnglish
Article number037702
JournalChinese Physics Letters
Volume28
Issue number3
DOIs
Publication statusPublished - Mar 2011

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