Pramana

, Volume 84, Issue 6, pp 987–997 | Cite as

Site-specific doping, tunable dielectric properties and intrinsic paramagnetism in Mn-doped SrTiO 3

Article

Abstract

Mn doping in SrTiO3 leads to the emergence of qualitatively distinct and novel physical properties. We show that Mn ions can be controllably doped at either of the perovskite A (Sr) or B (Ti) site as well as at both sites simultaneously and the resultant physical properties depend intimately on the particular dopant site. We critically review the recent literature on various Mn-doped SrTiO3 systems, which includes reports of dielectric glass, spin-glass and ferromagnetism and by combining experiments with first-principles calculations, we demonstrate that depending on the particular dopant site for Mn ions, the dielectric properties can be widely tuned from a quantum paraelectric to a dielectric glass. However, the intrinsic magnetism in all these cases remains essentially paramagnetic for phase-pure systems.

Keywords

Doping relaxor paramagnet. 

PACS Nos

75.20.−g 77.80.Jk 71.30.+h 

Notes

Acknowledgements

DC acknowledges exciting collaboration with 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, B Pal, O Karis, M Unnikrishnan and D D Sarma which contributed to most of the data and ideas presented in this review.

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Copyright information

© Indian Academy of Sciences 2015

Authors and Affiliations

  1. 1.Department of PhysicsIndian Institute of TechnologyKharagpurIndia

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