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Keywords = zirconium and iron co-doped

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12 pages, 3136 KB  
Article
Magnetic and Dielectric Properties of Cobalt and Zirconium Co-Doped Iron Oxide Nanoparticles via the Hydrothermal Synthesis Approach
by Saba Yaqoob, Zulfiqar Ali and Alberto D’Amore
J. Compos. Sci. 2025, 9(1), 32; https://doi.org/10.3390/jcs9010032 - 11 Jan 2025
Cited by 3 | Viewed by 1842
Abstract
This study investigates the magnetic and dielectric properties of cobalt–zirconium co-doped iron oxide nanoparticles synthesized via the hydrothermal method. The synthesis was conducted at 150 °C, with reaction times of 4, 6, 8, 10, and 12 h. Co-doping with cobalt and zirconium significantly [...] Read more.
This study investigates the magnetic and dielectric properties of cobalt–zirconium co-doped iron oxide nanoparticles synthesized via the hydrothermal method. The synthesis was conducted at 150 °C, with reaction times of 4, 6, 8, 10, and 12 h. Co-doping with cobalt and zirconium significantly influenced the magnetic phase formation of iron oxide. Magnetic properties were characterized using a Vibrating Sample Magnetometer (VSM), revealing ferromagnetic behavior with a maximum saturation magnetization of 45 emu/g for the 8 h sample. The dielectric properties were analyzed through impedance spectroscopy across a wide frequency range, and the results were interpreted using Maxwell–Wagner’s model and Koop’s theory. The dielectric constant reached its maximum value of approximately 58 at a logarithmic frequency of 1.5 Hz for the sample synthesized for 8 h. This study highlights the importance of synthesis time in optimizing both the magnetic and dielectric properties of (Co, Zr) co-doped iron oxide nanoparticles. Full article
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2 pages, 142 KB  
Correction
Correction: Saeed, S., et al. Enhancement of Photorefraction in Vanadium-Doped Lithium Niobate through Iron and Zirconium Co-Doping. Materials 2019, Vol. 12, 3143
by Shahzad Saeed, Hongde Liu, Liyun Xue, Dahuai Zheng, Shiguo Liu, Shaolin Chen, Yongfa Kong, Romano Rupp and Jingjun Xu
Materials 2020, 13(22), 5299; https://doi.org/10.3390/ma13225299 - 23 Nov 2020
Cited by 1 | Viewed by 1566
Abstract
The authors wish to make the following corrections to this paper [...] Full article
10 pages, 2003 KB  
Article
Enhancement of Photorefraction in Vanadium-Doped Lithium Niobate through Iron and Zirconium Co-Doping
by Shahzad Saeed, Hongde Liu, Liyun Xue, Dahuai Zheng, Shiguo Liu, Shaolin Chen, Yongfa Kong, Romano Rupp and Jingjun Xu
Materials 2019, 12(19), 3143; https://doi.org/10.3390/ma12193143 - 26 Sep 2019
Cited by 10 | Viewed by 3106 | Correction
Abstract
A series of mono-, double-, and tri-doped LiNbO3 crystals with vanadium were grown by Czochralski method, and their photorefractive properties were investigated. The response time for 0.1 mol% vanadium, 4.0 mol% zirconium, and 0.03 wt.% iron co-doped lithium niobate crystal at 488 [...] Read more.
A series of mono-, double-, and tri-doped LiNbO3 crystals with vanadium were grown by Czochralski method, and their photorefractive properties were investigated. The response time for 0.1 mol% vanadium, 4.0 mol% zirconium, and 0.03 wt.% iron co-doped lithium niobate crystal at 488 nm was shortened to 0.53 s, which is three orders of magnitude shorter than the mono-iron-doped lithium niobate, with a maintained high diffraction efficiency of 57% and an excellent sensitivity of 9.2 cm/J. The Ultraviolet-visible (UV-Vis) and OH absorption spectra were studied for all crystals tested. The defect structure is discussed, and a defect energy level diagram is proposed. The results show that vanadium, zirconium, and iron co-doped lithium niobate crystals with fast response and a moderately large diffraction efficiency can become another good candidate material for 3D-holographic storage and dynamic holography applications. Full article
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