Multiferroic materials show coexistence of ferroelectric and magnetic ordering. They exhibit unusual physical properties owing to the coupling between their ferroic orderings. The coupling between magnetic and ferroelectric orderings in multiferroics, which causes novel composite properties, is known asmagnetoelectric coupling. Due to the composite properties of magnetic and ferroelectric orders, multiferroic materials are highly attractive for a wide range of applications such as magnetoelectric memory, sensing, and energy conversion.1,2 Particularly, multiferroic materials would bring a revolution inenvironmental-friendly magnetic refrigeration technology by exploiting the electrical-field-assisted control of magnetism.3 We have prepared mutltiferroic nanoparticles of BiGdFeTiO3 by simply ultrasonicating the powder of bulkceramics in isopropanol.4 The obtained materials after sonication consist of ultrafine monodisperse singlecrystallinenanoparticles and show enhanced ferromagnetism at room temperature. Especially, by cooling the nanoparticles in magnetic field, exchange bias effect, which is manifested by the shift of the magnetic hysteresis loop along the applied field [Fig.1(c)] due to the exchange coupling between antiferromagnetism and ferromagnetism, has been established and appears to vary with the cooling field and the temperature.This finding is very crucial for application of multiferroic nanoparticle in spin-electronic technology, and clean-tech energy conversion.
|Title of host publication||Abstract Book - DTU Sustain Conference 2014|
|Number of pages||1|
|Place of Publication||Kgs. Lyngby|
|Publisher||Technical University of Denmark|
|Publication status||Published - 2014|
|Event||DTU Sustain Conference 2014 - Technical University of Denmark, Lyngby, Denmark|
Duration: 17 Dec 2014 → 17 Dec 2014
|Conference||DTU Sustain Conference 2014|
|Location||Technical University of Denmark|
|Period||17/12/2014 → 17/12/2014|
Ngo, D-T., Abdul Basith, M., Hung, T. Q., & Mølhave, K. (2014). Tunable exchange bias effect in BiGdFeTiO3 mutlferroic nanoparticles. In Abstract Book - DTU Sustain Conference 2014 Technical University of Denmark.