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

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.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4] ;  [5] ; ; ;  [1] ; ;  [6]
  1. Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas 78249 (United States)
  2. (Brazil)
  3. Department of Physics, State University of Maringá, Maringá – PR 87020-900 (Brazil)
  4. Department of Physics, Universidade Estadual do Centro-Oeste, Guarapuava – PR 85040-080 (Brazil)
  5. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas – SP 13083-859 (Brazil)
  6. Department of Physics, Federal University of São Carlos, São Carlos – SP 13565-905 (Brazil)
Publication Date:
OSTI Identifier:
22413093
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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