稀有金属：英文版, 2017, Vol.36 (1), p.32-36
2017
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Exchange bias on polycrystalline BiFeO3/CO2Fe（Al0.5Si0.5）heterostructures
- Ist Teil von
- 稀有金属：英文版, 2017, Vol.36 (1), p.32-36
- Erscheinungsjahr
- 2017
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- Polycrystalline antiferromagnetic BiFeO3 （BFO）thin films were grown on Si/SiO2/Ti/Pt （111） substrates bypulsed laser deposition and then ferromagnetic filmsCO2Fe（Al0.5Si0.5） （CFAS） by magnetron sputtering. Afterfabrication, the films were vacuum-annealed under a 0.1-Tmagnetic field at different temperatures from 150 to 500 ℃.The exchange bias field can be tuned by the annealing tem-perature for the heterostructures, and the electric domain sizecan be controlled by the crystal grain size. A large exchangebias of about 5 × 10^3 T is observed in one of the samples. Itcan be speculated that the crystal grain sizes are the key ele-ment in determining the exchange bias and coercivity of thefilms annealed at the temperature of higher than Neel tem-perature （TN） of BFO. Furthermore, it is possible to extendspin theories from single-crystal BFO system to polycrys-talline BFO system.