Magnetic and ferroelectric properties of Fe doped SrTiO3-δ films

被引：32

作者：

Kumar, A. Sendil ^{[1
]}

Suresh, P. ^{[1
]}

Kumar, M. Mahesh ^{[2
]}

Srikanth, H. ^{[3
]}

Post, M. L. ^{[2
]}

Sahner, Kathy ^{[4
]}

Moos, Ralf ^{[4
]}

Srinath, S. ^{[1
]}

机构：

[1] Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India

[2] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada

[3] Univ S Florida, Dept Phys, Phys Mat Lab, Tampa, FL 33620 USA

[4] Univ Bayreuth, Funct Mat, D-95447 Bayreuth, Germany

来源：

INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) | 2010年 / 200卷

关键词：

DC ELECTRICAL DEGRADATION; PEROVSKITE-TYPE TITANATES; CERAMICS;

D O I：

10.1088/1742-6596/200/9/092010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 (T-C) close to room temperature or higher. By inducing strains by chemical substitutions, it was possible to obtain TC as high as 200 degrees C in SrTiO3 modified with Fe4+. Hysteresis loops obtained confirms the presence of ferroelectric domains. Two apparent transitions, one at similar to 200 degrees C and another similar to 300 degrees C were seen in epsilon', which are replicated as sharp drops in resistivity curves. These temperatures far exceed the T(C)s 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.

引用

页数：4

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