Exchange bias effect in Bi{sub 2}Fe{sub 3}AlO{sub 9} ceramics

Journal Article · Mon Nov 10 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4902110· OSTI ID:22391964

Huang, S.; Shi, L. R.; Sun, H. G.; Zhu, C. M.; Tian, Z. M.

The exchange bias (EB) effect is observed in Bi{sub 2}Fe{sub 3}AlO{sub 9} polycrystalline ceramics. The EB field (H{sub EB}), vertical magnetization shift, and coercive field show a strong dependence on the cooling fields. When a larger applied field is used to measure the hysteresis loop, the EB effect is suppressed. The induced spin-glass-like phase via Al{sup 3+} doping is responsible for the EB effect below the spin-glass temperature (T{sub SG}) of ∼25 K. Moreover, the H{sub EB} varies nonmonotonically with temperature above T{sub SG}, which is interpreted using a random field model with the exchange coupling between ferromagnetic clusters and an antiferromagnetic phase.

• OSTI ID: 22391964
• Journal Information: Applied Physics Letters, Vol. 105, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM IONS
ALUMINIUM OXIDES
ANTIFERROMAGNETISM
BISMUTH COMPOUNDS
CERAMICS
COOLING
DOPED MATERIALS
HYSTERESIS
IRON COMPOUNDS
MAGNETIZATION
POLYCRYSTALS
RANDOMNESS
SPIN GLASS STATE