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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


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.

Original languageEnglish (US)
Article number125124
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - Sep 13 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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