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Multiferroic behavior of BTO-Nanoparticles

  • Steffen Trimper
  • Safa Golrokh Bahoosh
  • Julia M. Wesselinowa
Part of the Springer Proceedings in Physics book series (SPPHY, volume 140)

Abstract

Using microscopically models and Green’s function techniques we demonstrate how one can get information of ferroelectric nanoparticles. The approach can be extended to multiferroic systems which are defined as materials possessing two or more ferroic orders in a single phase. In detail we show that the unexpected ferromagnetic properties of BaTiO3 (BTO) observed recently at room temperatures are due to oxygen vacancies at the surface of the nanocrystalline materials. Such vacancies lead to the appearance of Ti3 +  or Ti2 +  ions with nonzero net spin. The resulting different valence offers a nonzero magnetization which decreases with increasing particle size. The system shows a multiferroic behavior below a critical size of the nanoparticles and the related polarization tends to a saturation value when the particle size is enhanced.

Keywords

Oxygen Vacancy Multiferroic Property Magnetic Particle Image Multiferroic Behavior Ferroelectric Nanoparticles 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag GmbH Berlin Heidelberg 2012

Authors and Affiliations

  • Steffen Trimper
    • 1
  • Safa Golrokh Bahoosh
    • 1
  • Julia M. Wesselinowa
    • 2
  1. 1.Institute of PhysicsMartin-Luther-UniversityHalle (Saale)Germany
  2. 2.Department of PhysicsUniversity SofiaSofiaBulgaria

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