Room temperature nonlinear magnetoelectric effect in lead-free and Nb-doped AlFeO{sub 3} compositions

Journal Article · Sat Feb 14 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4908016· OSTI ID:22413093

Santos, Guilherme M.; Santos, Ivair A. ^[1]; Freitas, Valdirlei F. ^[2]; Coelho, Adelino A. ^[3]; Pal, Madhuparna; Guo, Ruyan; Bhalla, Amar S. ^[4]; Garcia, Ducinei; Eiras, José A. ^[5]

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1. Department of Physics, State University of Maringá, Maringá – PR 87020-900 (Brazil)
2. Department of Physics, Universidade Estadual do Centro-Oeste, Guarapuava – PR 85040-080 (Brazil)
3. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas – SP 13083-859 (Brazil)
4. Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas 78249 (United States)
5. Department of Physics, Federal University of São Carlos, São Carlos – SP 13565-905 (Brazil)

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 (AlFeO{sub 3}), 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 AlFeO{sub 3} and 2 at. % Nb-doped AlFeO{sub 3} multiferroic magnetoelectric compositions are studied. Pyroelectric and magnetic measurements show changes in ferroelectric and magnetic states close to each other (∼200 K). The magnetoelectric coefficient behavior as a function of H{sub bias} suggests a room temperature nonlinear magnetoelectric coupling in both single-phase and Nb-doped AlFeO{sub 3}-based ceramic compositions.

• OSTI ID: 22413093
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
CERAMICS
COUPLING
DOPED MATERIALS
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
IRON OXIDES
MAGNETIC PROPERTIES
NONLINEAR PROBLEMS
SPIN GLASS STATE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K