Abstract
In this presentation, I will briefly present some of the interestingstatic and dynamical aspects of few selected magnetic insulators andmetals.The electronic structure, vibrational properties and interestingdielectric nature of perovskites A(Ca,Sr,Ba)MnO3 will be discussed fromfirst principles, particularly the possibility to engineer a transitionmetal driven type-I multiferroicity in these oxides[1] will be specified.Then I will highlight some dielectric properties of Mn -doped SrTiO3 [2].In short, the quasiparticle electronic structure of thin films of localmoment systems like GdN and GdS will be reviewed [3]. Also I will presentsome of the results of the spin dynamics simulation for the magnetizationdynamics in an synthetic antiferromagnet subjected to a short pulse,particularly in terms of experimentally observed inertia like behavior init’s magnetization dynamics[4]. Finally an effort to develop a generalformalism to describe the experimentally observed spin dynamics infemto-second time scale will be discussed [5].References:[1] S. Bhattacharjee, E. Bousquet and Philippe Ghosez , Phys. Rev.Lett.,102, 117602 (2009)[2] Debraj Choudhury, P. Mandal, A. Sundaresan, Umesh V. Waghmare,Satadeep Bhattacharjee, R. Mathieu, P. Lazor, Olle Eriksson, B. Sanyal,P. Nordblad, Ajay Sharma, S. V. Bhat, O. Karis, D. D. Sarma, cond-mat.,1009.4792, (2010),[3] S. Bhattacharjee and S.M Jaya, Eur. Phys. J. B 49, 305-311 (2006) .[4] S. Bhattacharjee, A. Bergman, A. Taroni, J. Hellsvik, B. Sanyaland O. Eriksson, arXiv:1109.1414, (2011).[5] S. Bhattacharjee, L.Nordstrom and J. Fransson (in manuscript).
