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Title: Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa{sub 0.5}Sr{sub 0.5}CoO{sub 3}-(1−x)BiFeO{sub 3}

Abstract

Nanopowder of ferromagnetic La{sub 0.5}Sr{sub 0.5}CoO{sub 3} (LSCO) and multiferroic BiFeO{sub 3} (BFO) were synthesized by spray pyrolysis method. Different compositions of multiferroic xLSCO-(1−x)BFO composites were synthesized at 800 °C for 2 h. Scanning electron microscopy and energy dispersive spectroscopy elemental mapping were performed to study the morphology of composites. Ferri/ferromagnetic responses above T{sub C} (LSCO) are observed, which are associated with the interfaces LSCO/BFO. This interface presents a different behavior compared to the original perovskites, and the magnitude of the magnetization depends on x. Electrical DC conductivity as a function of temperature for LSCO nanopowder (x = 1) presents a different behavior than that reported in bulk material. For x = 1 and 0.9, the model by Glazman and Matveev [Zh. Eksp. Teor. Fiz. 94, 332 (1988)] is proposed to describe the electrical conductivity. On the other hand, x = 0, 0.1, and 0.5 present a variable range hopping behavior. Complex impedance spectroscopy as a function of frequency indicates a pure resistive behavior for x ≥ 0.5 compositions, while a complex resistive-capacitive behavior is observed for low x values (0, 0.1). In these samples, low values of magnetoelectric coupling were measured with an AC lock-in technique.

Authors:
; ;  [1];  [2]
  1. Centro Atómico Bariloche, Comisión Nacional de Energía Atómica, CONICET and Instituto Balseiro, Universidad Nacional de Cuyo, 8400 San Carlos de Bariloche, RN (Argentina)
  2. INTEQUI, Universidad Nacional de San Luis, CONICET, Área de Química General e Inorgánica “Dr. G.F.Puelles”- Facultad de Química, Bioquímica y Farmacia, Chacabuco y Pedernera, 5700 San Luis (Argentina)
Publication Date:
OSTI Identifier:
22598902
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 120; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; COUPLING; ELECTRIC CONDUCTIVITY; FERROMAGNETIC MATERIALS; FREQUENCY DEPENDENCE; IMPEDANCE; INTERFACES; MAGNETIC PROPERTIES; MAGNETIZATION; MAPPING; MORPHOLOGY; NANOSTRUCTURES; PEROVSKITE; POWDERS; PYROLYSIS; SCANNING ELECTRON MICROSCOPY; SPECTROSCOPY; TEMPERATURE DEPENDENCE

Citation Formats

Lohr, Javier H., Saleta, Martín E., Sánchez, Rodolfo D., E-mail: rodo@cab.cnea.gov.ar, and López, Carlos A.. Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa{sub 0.5}Sr{sub 0.5}CoO{sub 3}-(1−x)BiFeO{sub 3}. United States: N. p., 2016. Web. doi:10.1063/1.4960697.
Lohr, Javier H., Saleta, Martín E., Sánchez, Rodolfo D., E-mail: rodo@cab.cnea.gov.ar, & López, Carlos A.. Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa{sub 0.5}Sr{sub 0.5}CoO{sub 3}-(1−x)BiFeO{sub 3}. United States. doi:10.1063/1.4960697.
Lohr, Javier H., Saleta, Martín E., Sánchez, Rodolfo D., E-mail: rodo@cab.cnea.gov.ar, and López, Carlos A.. Sun . "Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa{sub 0.5}Sr{sub 0.5}CoO{sub 3}-(1−x)BiFeO{sub 3}". United States. doi:10.1063/1.4960697.
@article{osti_22598902,
title = {Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa{sub 0.5}Sr{sub 0.5}CoO{sub 3}-(1−x)BiFeO{sub 3}},
author = {Lohr, Javier H. and Saleta, Martín E. and Sánchez, Rodolfo D., E-mail: rodo@cab.cnea.gov.ar and López, Carlos A.},
abstractNote = {Nanopowder of ferromagnetic La{sub 0.5}Sr{sub 0.5}CoO{sub 3} (LSCO) and multiferroic BiFeO{sub 3} (BFO) were synthesized by spray pyrolysis method. Different compositions of multiferroic xLSCO-(1−x)BFO composites were synthesized at 800 °C for 2 h. Scanning electron microscopy and energy dispersive spectroscopy elemental mapping were performed to study the morphology of composites. Ferri/ferromagnetic responses above T{sub C} (LSCO) are observed, which are associated with the interfaces LSCO/BFO. This interface presents a different behavior compared to the original perovskites, and the magnitude of the magnetization depends on x. Electrical DC conductivity as a function of temperature for LSCO nanopowder (x = 1) presents a different behavior than that reported in bulk material. For x = 1 and 0.9, the model by Glazman and Matveev [Zh. Eksp. Teor. Fiz. 94, 332 (1988)] is proposed to describe the electrical conductivity. On the other hand, x = 0, 0.1, and 0.5 present a variable range hopping behavior. Complex impedance spectroscopy as a function of frequency indicates a pure resistive behavior for x ≥ 0.5 compositions, while a complex resistive-capacitive behavior is observed for low x values (0, 0.1). In these samples, low values of magnetoelectric coupling were measured with an AC lock-in technique.},
doi = {10.1063/1.4960697},
journal = {Journal of Applied Physics},
number = 7,
volume = 120,
place = {United States},
year = {Sun Aug 21 00:00:00 EDT 2016},
month = {Sun Aug 21 00:00:00 EDT 2016}
}