Effect of magnetic field on ferroelectric output voltage: a study on La0.7Sr0.3MnO3 (LSMO)/P(VDF-TrFE) flexible multiferroic nanocomposite films

• Published in: Journal of materials science. Materials in electronics Vol. 32; no. 16; pp. 21780 - 21797
• Main Authors: Koner, Sougata, Deshmukh, Pratik, Ahlawat, Anju, Sagdeo, Archna, Singh, Rashmi, Karnal, A. K., Satapathy, S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-08-2021; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Coefficient of variation; Curie temperature; Current density; Die casting; Electric potential; Ferroelectricity; Ferromagnetism; Leakage current; Low temperature; Magnetic fields; Magnetism; Materials Science; Multiferroic materials; Nanocomposites; Nanoparticles; Optical and Electronic Materials; Room temperature; Sol-gel processes; Tangents; Voltage
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-06699-4

La
0.7
Sr
0.3
MnO
3
(LSMO)/poly(vinylidenefluoride-co-trifluoroethylene)(P(VDF-TrFE) particulate nanocomposite films prepared to produce large magnetoelectric (ME) voltage at room temperature for multifunctional device applications. LSMO nanoparticles (NPs) were prepared by sol–gel auto-combustion method and these NPs belong to space group R-3c. LSMO/P(VDF-TrFE) (0–3) nanocomposite (NC) films were prepared by solution casting method for different volume percentage of LSMO in P(VDF-TrFE). Dielectric and DC leakage current density(J) analysis of these NCs reveal very small loss tangents (~ 0.01) and very small leakage current density J ~ 10
−7
 A/mm
2
respectively, which further demonstrate the uniform distribution of NPs in P(VDF-TrFE) matrix. Room temperature M-H and low temperature M-T analysis of LSMO NPs confirm ferromagnetic nature with Curie temperature at ~ 368 K. LSMO/P(VDF-TrFE) NC films exhibit multiferroic properties up to 5% volume percentage of LSMO at room temperature. A maximum ME voltage 11.68 mV is produced corresponding to giant transverse ME voltage coefficient (
α
31
V
)
= 155.74 mVOe
−1
 cm
−1
at DC magnetic field (H
dc
) = 2.57 kOe and AC magnetic fileld(H
ac
) = 25Oe for 0.5% LSMO volume percentage NC films. A self bias ME voltage 11.3175 mV is observed at zero H
dc
for 0.5% LSMO volume percentage NC films, which can be used inpotential ME devices.The variation of ME voltage coefficient
α
V
at different angles between P and applied magnetic field(H
dc
) for 0.5% LSMO NC films is also reported which shows
α
V
is maximum at the angles 90º and 270º.