Author/Authors :
Kharrazi، نويسنده , , Sharmin and Kundaliya، نويسنده , , Darshan C. and Gosavi، نويسنده , , S.W. and Kulkarni، نويسنده , , S.K. and Venkatesan، نويسنده , , T. and Ogale، نويسنده , , S.B. and Urban، نويسنده , , J. and Park، نويسنده , , S. and Cheong، نويسنده , , S.-W.، نويسنده ,
Abstract :
We report on the synthesis of TbMnO3 nanoparticles by chemical co-precipitation route and their structural, chemical bonding, magnetic and dielectric properties. It is shown that the interesting multiferroic properties of this system as reflected by the concurrent occurrence of magnetic and dielectric transitions are retained in the nanoparticles (size∼40 nm). However, the nanoparticle constitution and properties are seen to depend significantly on the calcination temperature. While the nanoparticles obtained by calcination at 800 °C correspond very well with the reported properties of single phase TbMnO3 (all the key magnetic and dielectric features near 7, 27 and 41 K, albeit with reduced dielectric constant) the nanoparticles obtained by calcination at 900 °C develop a Tb deficient skin which softens the transitions, reducing the dielectric constant further.
