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Ferroelectric and magnetic properties of Nd-doped Bi4 - xFeTi3O12 nanoparticles prepared through the egg-white method.

Batoo KM, Labis JP, Sharma R, Singh M - Nanoscale Res Lett (2012)

Bottom Line: Room temperature polarization-electric field (P-E) curves show that the samples are not saturated with maximum remanence polarization, Pr = 0.110 μC/cm2, and a relatively low coercive field, Ec = of 7.918 kV/cm, at an applied field of 1 kV/cm was observed for 5% Nd doping.The room temperature M-H hysteresis curve shows that the samples exhibit intrinsic antiferromagnetism with a weak ferromagnetism.These properties entitle the grown nanoparticles of BNFT as one of the few multiferroic materials that exhibit decent magnetization and electric polarization.

View Article: PubMed Central - HTML - PubMed

Affiliation: King Abdullah Institute for Nanotechnology, King Saud University, P,O, Box 2460, Riyadh, 1151, Saudi Arabia. khalid.mujasam@gmail.com.

ABSTRACT
Multiferroic behavior of Bi4 - xNdxFeTi3O12 (0.0 ≤ × ≤ 0.25, × = 0.05) ceramic nanoparticles prepared through the egg-white method was investigated. The dielectric properties of the samples show normal behavior and are explained in the light of space charge polarization. Room temperature polarization-electric field (P-E) curves show that the samples are not saturated with maximum remanence polarization, Pr = 0.110 μC/cm2, and a relatively low coercive field, Ec = of 7.918 kV/cm, at an applied field of 1 kV/cm was observed for 5% Nd doping. The room temperature M-H hysteresis curve shows that the samples exhibit intrinsic antiferromagnetism with a weak ferromagnetism. These properties entitle the grown nanoparticles of BNFT as one of the few multiferroic materials that exhibit decent magnetization and electric polarization.

No MeSH data available.


Room temperature hysteresis magnetization. With inset showing the magnified plot showing the ferromagnetic character of the grown nanoparticles.
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Figure 11: Room temperature hysteresis magnetization. With inset showing the magnified plot showing the ferromagnetic character of the grown nanoparticles.

Mentions: Figure 11 shows the magnetization versus magnetic field (MH) hysteresis loops for the BNTF nanoparticles at room temperature for the maximum applied field (H) of 20 kOe. It is seen that all the samples show intrinsic antiferromagnetism and a weak ferromagnetism with a maximum value of remnant magnetization (Mr) of 0.00107 emu/gm for sample x = 0.05. Various authors have reported earlier similar results [24-26]. The Mr value decreases with increasing Nd doping percentage. The substitution of Nd at Bi site may lead to the effective suppression of the spiral spin structure of BNTF, resulting in the appearance of magnetization. In order to verify and evaluate further the source of magnetism in the grown nanoparticles, room temperature Mossbauer spectroscopy measurements were tried on the present samples, but due to low percentage of Fe57 in the pure and doped samples, no clear Mossbauer peaks were observed.


Ferroelectric and magnetic properties of Nd-doped Bi4 - xFeTi3O12 nanoparticles prepared through the egg-white method.

Batoo KM, Labis JP, Sharma R, Singh M - Nanoscale Res Lett (2012)

Room temperature hysteresis magnetization. With inset showing the magnified plot showing the ferromagnetic character of the grown nanoparticles.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3475093&req=5

Figure 11: Room temperature hysteresis magnetization. With inset showing the magnified plot showing the ferromagnetic character of the grown nanoparticles.
Mentions: Figure 11 shows the magnetization versus magnetic field (MH) hysteresis loops for the BNTF nanoparticles at room temperature for the maximum applied field (H) of 20 kOe. It is seen that all the samples show intrinsic antiferromagnetism and a weak ferromagnetism with a maximum value of remnant magnetization (Mr) of 0.00107 emu/gm for sample x = 0.05. Various authors have reported earlier similar results [24-26]. The Mr value decreases with increasing Nd doping percentage. The substitution of Nd at Bi site may lead to the effective suppression of the spiral spin structure of BNTF, resulting in the appearance of magnetization. In order to verify and evaluate further the source of magnetism in the grown nanoparticles, room temperature Mossbauer spectroscopy measurements were tried on the present samples, but due to low percentage of Fe57 in the pure and doped samples, no clear Mossbauer peaks were observed.

Bottom Line: Room temperature polarization-electric field (P-E) curves show that the samples are not saturated with maximum remanence polarization, Pr = 0.110 μC/cm2, and a relatively low coercive field, Ec = of 7.918 kV/cm, at an applied field of 1 kV/cm was observed for 5% Nd doping.The room temperature M-H hysteresis curve shows that the samples exhibit intrinsic antiferromagnetism with a weak ferromagnetism.These properties entitle the grown nanoparticles of BNFT as one of the few multiferroic materials that exhibit decent magnetization and electric polarization.

View Article: PubMed Central - HTML - PubMed

Affiliation: King Abdullah Institute for Nanotechnology, King Saud University, P,O, Box 2460, Riyadh, 1151, Saudi Arabia. khalid.mujasam@gmail.com.

ABSTRACT
Multiferroic behavior of Bi4 - xNdxFeTi3O12 (0.0 ≤ × ≤ 0.25, × = 0.05) ceramic nanoparticles prepared through the egg-white method was investigated. The dielectric properties of the samples show normal behavior and are explained in the light of space charge polarization. Room temperature polarization-electric field (P-E) curves show that the samples are not saturated with maximum remanence polarization, Pr = 0.110 μC/cm2, and a relatively low coercive field, Ec = of 7.918 kV/cm, at an applied field of 1 kV/cm was observed for 5% Nd doping. The room temperature M-H hysteresis curve shows that the samples exhibit intrinsic antiferromagnetism with a weak ferromagnetism. These properties entitle the grown nanoparticles of BNFT as one of the few multiferroic materials that exhibit decent magnetization and electric polarization.

No MeSH data available.