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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Room temperature nonlinear magnetoelectric effect in lead-free and Nb-doped AlFeO3 compositions

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Author(s):
Cotica, Luiz F. [1, 2] ; Santos, Guilherme M. [1] ; Freitas, Valdirlei F. [3] ; Coelho, Adelino A. [4] ; Pal, Madhuparna [2] ; Santos, Ivair A. [1] ; Garcia, Ducinei [5] ; Eiras, Jose A. [5] ; Guo, Ruyan [2] ; Bhalla, Amar S. [2]
Total Authors: 10
Affiliation:
[1] Univ Estadual Maringa, Dept Phys, BR-87020900 Maringa, Parana - Brazil
[2] Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX 78249 - USA
[3] Univ Estadual Centro Oeste, Dept Phys, BR-85040080 Guarapuava, PR - Brazil
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[5] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Applied Physics; v. 117, n. 6 FEB 14 2015.
Web of Science Citations: 2
Abstract

It is still a challenging problem to obtain technologically useful materials displaying strong magnetoelectric coupling at room temperature. In the search for new effects and materials to achieve this kind of coupling, a nonlinear magnetoelectric effect was proposed in the magnetically disordered relaxor ferroelectric materials. In this context, the aluminum iron oxide ( AlFeO3), a room temperature ferroelectric relaxor and magnetic spin glass compound, emerges as an attractive lead-free magnetoelectric material along with nonlinear magnetoelectric effects. In this work, static, dynamic, and temperature dependent ferroic and magnetoelectric properties in lead-free AlFeO3 and 2 at.% Nb-doped AlFeO3 multiferroic magnetoelectric compositions are studied. Pyroelectric and magnetic measurements show changes in ferroelectric and magnetic states close to each other ( similar to 200 K). The magnetoelectric coefficient behavior as a function of Hbias suggests a room temperature nonlinear magnetoelectric coupling in both single-phase and Nb-doped AlFeO3-based ceramic compositions. (C) 2015 AIP Publishing LLC. (AU)

FAPESP's process: 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications
Grantee:José Antonio Eiras
Support Opportunities: Research Projects - Thematic Grants