Size effects on static and dynamic properties of ferroelectric nanoparticles
作者： Th. Michael , S. Trimper , J. M. Wesselinowa
DOI: 10.1103/PHYSREVB.76.094107
关键词: Transverse field 、 Particle size 、 Condensed matter physics 、 Excitation 、 Polarization (waves) 、 Materials science 、 Ferroelectricity 、 Soft modes 、 Nanoparticle 、 Ising model 、 Electronic, Optical and Magnetic Materials
摘要: Ferroelectric nanoparticles are described by a microscopic model which enables one to find the macroscopic polarization as well excitation energy of soft mode and its damping with dependence on temperature size particles. The constituents material arranged in shells, their interaction depends both coupling at surface within bulk. A Green's function technique real space is applied analyze Ising transverse field, modified such manner be able study also spherical nanoparticles. Furthermore, we investigate influence effects critical temperature. Whereas lowered significantly decreasing particle size, enhanced. Additionally, consider defects spectrum. theoretical results compared experimental data.
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