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Phase transition and magneto-electric coupling of BiFeO3–YMnO3 multiferroic nanoceramics
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10.1063/1.4824061
/content/aip/journal/jap/114/14/10.1063/1.4824061
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/14/10.1063/1.4824061

Figures

Image of FIG. 1.
FIG. 1.

(a) Rietveld refinement of X-ray diffraction patterns of the solid solution (1−) BiFeO-YMnO for compositional range (0.00 ≤  ≤ 0.2) at room temperature. (b) Normalized lattice parameters (i.e., N =  /√2, N =  /√12) and ( N/ N) of 3 phase as a function of composition () along with normalized lattice parameter of phase (i.e., N ≈  N ≈ √2 , N =  /2). (c) Crystallite size and rms strain estimated from double-Voigt method as a function of .

Image of FIG. 2.
FIG. 2.

TEM micrographs for (a)  = 0.00 and (b)  = 0.1. SAED patterns for (c)  = 0.00 and (d)  = 0.1.

Image of FIG. 3.
FIG. 3.

FESEM micrographs of (a)  = 0.00, (b)  = 0.05, (c)  = 0.1, and (d)  = 0.2, respectively.

Image of FIG. 4.
FIG. 4.

Temperature dependent dielectric parameters of (1−) BiFeO-YMnO system for (0.00 ≤  ≤ 0.2): (a) ε at 5 kHz, (b) tanδ at 100 kHz, temperature dependent dielectric permittivity at different frequencies between 1 kHz and 1 MHz for (c)  = 0.1 and (d)  = 0.2, respectively. Inset: temperature dependence of tan δ at 100 kHz for (c)  = 0.1 and (d)  = 0.2.

Image of FIG. 5.
FIG. 5.

(a) hysteresis curve for (1−) BiFeO-YMnO system for (0.00 ≤  ≤ 0.075) at room temperature. Inset: Compositional dependence () of coercive field ( ). (b) M-H hysteresis curve of (1−) BiFeO-YMnO system for (0.1 ≤  ≤ 0.2) at room temperature. Inset: magnification at lower fields.

Image of FIG. 6.
FIG. 6.

Frequency dependent behavior of (a) dielectric permitivity (ε), (b) loss tangent (tan δ), (c) impedance (Z), (d) phase angle (θ) of  = 0.2 under different magnetic fields, 0 ≤  ≤ 2 T.

Image of FIG. 7.
FIG. 7.

Magnetic field dependent behavior of (a) dielectric permitivity (ε), (b) loss tangent (tanδ), (c) impedance (Z), (d) phase angle (θ) of (1−) BiFeO-YMnO system for 0.00 ≤  ≤ 0.2 at 1 kHz.

Tables

Generic image for table
Table I.

Wyckoff notation and atomic positions of (1−) BiFeO-YMnO for composition range (0.00 ≤  ≤ 0.2) used in Rietveld refinement.

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/content/aip/journal/jap/114/14/10.1063/1.4824061
2013-10-10
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phase transition and magneto-electric coupling of BiFeO3–YMnO3 multiferroic nanoceramics
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/14/10.1063/1.4824061
10.1063/1.4824061
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