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Magnetic and ferroelectric properties of Fe doped SrTiO3 film

Title data

Kumar, A. Sendil ; Suresh, P. ; Kumar, M. M. ; Post, Michael L. ; Sahner, Kathy ; Moos, Ralf ; Srinath, S.:
Magnetic and ferroelectric properties of Fe doped SrTiO3 film.
Event: ICM 2009 : International Conference on Magnetism , 26.-31.07.2009 , Karlsruhe, Germany.
(Conference item: Conference , Speech )

Official URL: Volltext

Abstract in another language

Recent interest in SrTiO3 stems from its wide applicability in microwave devices based on the tunable characteristics of dielectric constant in the microwave frequency range. It is obvious that for any such application, SrTiO3 should have a ferroelectric Curie temperature (TC) close to room temperature or higher. By inducing strains by chemical substitutions, it was possible to obtain TC as high as 200°C in SrTiO3 modified with Fe4+. Hysteresis loops obtained confirms the presence of ferroelectric domains. Two apparent transitions, one at ~200 °C and another ~300 °C were seen in epsilon', which are replicated as sharp drops in resistivity curves. These temperatures far exceed the TCs reported in the literature till now and could open new avenues for innumerable other applications for SrTiO3. The magnetic properties of Fe doped SrTiO3 are also investigated. Low doping of Fe exhibits simple antiferromagnetic behaviour.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 27 Apr 2015 12:54
Last Modified: 21 Apr 2016 12:03
URI: https://eref.uni-bayreuth.de/id/eprint/11292