Room temperature polar and weak-ferromagnetic oxide with low dielectric loss

被引：3

作者：

Katragadda, Nagamalleswari ^{[1
]}

Mandal, Pranab ^{[1
]}

Yanda, Premakumar ^{[2
]}

Sundaresan, A. ^{[2
]}

Kaushik, S. D. ^{[3
]}

Zhang, Weiguo ^{[4
]}

Halasyamani, P. Shiv ^{[4
]}

Manjon-Sanz, Alicia Maria ^{[5
]}

机构：

[1] SRM Univ AP, Dept Phys, Amaravati 522240, Andhra Pradesh, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Sch Adv Mat, Chem & Phys Mat Unit, Jakkur PO, Bangalore 560064, India

[3] BARC, UGC DAE Consortium Sci Res Mumbai Ctr, R-5 Shed, Mumbai 400085, India

[4] Univ Houston, Dept Chem, Houston, TX 77204 USA

[5] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2023年 / 298卷

关键词：

Perovskites; Multiferroic; Weak ferromagnetic; Polar; Impedance spectroscopy; POWDER DIFFRACTOMETER; BISMUTH; CERAMICS; BEHAVIOR; PHASE;

D O I：

10.1016/j.mseb.2023.116869

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single-phase materials that are simultaneously ferroelectric and ferromagnetic at room temperature are promising for devices such as non-volatile random-access memory. Perovskite BiFeO3 which crystallizes in the polar rhombohedral structure (R3c) is ferroelectric and antiferromagnetic at room temperature. Here, we report a family of perovskite oxides in the BiFeO3 - Bi2/3TiO3 - ATiO3 (where A2+ is divalent alkaline earth metal ions e. g., Ca2+, Sr2+, Ba2+) ternary phase diagram that is polar as well as weak ferromagnetic above room temperature. The composition (Bi0.9167A0.075)(Fe0.9Ti0.1)O3 crystallizes in the polar rhombohedral structure space group R3c as corroborated by powder X-ray and neutron diffraction analysis. The nearly pure A-site perovskite possesses a long-range magnetic ordering above room temperature. These perovskites show a low dielectric loss, and the electrical response is dominated by grain contributions below 723 K.

引用

页数：7

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