S Mukherjee

Publications (2)0 Total impact

• Source

  Available from: D. D. Sarma

  Article: Tuning of dielectric properties and magnetism of SrTiO3 by site-specific doping of Mn

  D. Choudhury, S Mukherjee, P Mandal, A Sundaresan, U. V. Waghmare, S. Bhattacharjee, R. Mathieu, P. Lazor, O. Eriksson, B Sanyal, P. Nordblad, A Sharma, S. V. Bhat, O Karis, D. D. Sarma
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  ABSTRACT: Combining experiments with first principles calculations, we show that site-specific doping of Mn into SrTiO3 has a decisive influence on the dielectric properties of these doped systems. We find that phonon contributions to the dielectric constant invariably decrease sharply on doping at any site. However, a sizable, random dipolar contribution only for Mn at the Sr site arises from a strong off-centric displacement of Mn in spite of Mn being in a non-d0 state; this leads to a large dielectric constant at higher temperatures and gives rise to a relaxor ferroelectric behavior at lower temperatures. We also investigate magnetic properties in detail and critically reevaluate the possibility of a true multi-glass state in such systems.
  09/2010;
• Article: Tuning of dielectric properties and magnetism of SrTiO_ {3} by site-specific doping of Mn

  D. Choudhury, S. Mukherjee, P. Mandal, A. Sundaresan, U. V. Waghmare, S. Bhattacharjee, R. Mathieu, P. Lazor, O. Eriksson, B. Sanyal, P. Nordblad, A. Sharma, S. V. Bhat, O. Karis, D. D. Sarma
  [show abstract] [hide abstract]
  ABSTRACT: Combining experiments with first-principles calculations, we show that site-specific doping of Mn into SrTiO3 has a decisive influence on the dielectric properties of these doped systems. We find that phonon contributions to the dielectric constant invariably decrease sharply on doping at any site. However, a sizable, random dipolar contribution only for Mn at the Sr site arises from a strong off-centric displacement of Mn in spite of Mn being in a non-d0 state; this leads to a large dielectric constant at higher temperatures and gives rise to a relaxor ferroelectric behavior at lower temperatures. We also investigate magnetic properties in detail and critically reevaluate the possibility of a true multiglass state in such systems.
  Phys. Rev. B. 84(12).