Structural, optical, magnetic and dielectric properties of magnetite (Fe3O4) nanoparticles prepared by exploding wire technique

Influence of Ca substitution on structural, magnetic and dielectric properties of Ba3Co2-xCaxFe24O41(where x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0), prepared by Sol-Gel auto-combustion method, has been investigated in present studies. The obtained powder was sintered at 950 oC for 4 hrs. in the static air atmosphere. Structural analysis of Ca-doped Ba3Co2-xCaxFe24O41powders revealed pure Z-type hexaferrite phase at low temperature. The frequency dependent dielectric constant (Єʹ) and magnetic properties such as remanent magnetization (Mr), saturation magnetization (Ms) and coercivity (Hc) were studied. It is observed that coercivity increased gradually with increase in calcium content. The real dielectric constant (Єʹ) and dielectric loss tangent (tan δ) were studied in the frequency range of 20Hz to 2MHz. The dielectric parameters for all samples show normal dielectric behavior as observed in hexaferrites. Contents of Paper

Download Full-text

Clay Minerals Functionalized by Magnetite (Fe3O4) Nanoparticles as Solid Platform for Removal of Chromium (VI) from Water: Characterization, Kinetics, Thermodynamics, Analytical Utility and Reusability Studies

Analytical Chemistry Letters ◽

10.1080/22297928.2020.1861974 ◽

2020 ◽

Vol 10 (5) ◽

pp. 636-653

Author(s):

H.M Harbi ◽

A.H Al-Baqawi ◽

M.S El-Shahawi

Keyword(s):

Clay Minerals ◽

Fe3o4 Nanoparticles ◽

Chromium Vi ◽

Magnetite Fe3o4 ◽

Analytical Utility

Download Full-text

Microwave-Assisted Rapid Synthesis of Magnetite Fe3O4 Nanoparticles

Asian Journal of Chemistry ◽

10.14233/ajchem.2013.oh12 ◽

2013 ◽

Vol 25 (10) ◽

pp. 5542-5544 ◽

Cited By ~ 2

Author(s):

Chonghai Deng ◽

Hanmei Hu ◽

Xinqing Ge ◽

Chengliang Han ◽

Difang Zhao

Keyword(s):

Fe3o4 Nanoparticles ◽

Rapid Synthesis ◽

Microwave Assisted ◽

Magnetite Fe3o4

Download Full-text

Magnetic and Dielectric Properties of a Metal/ Cr2O3/Cr2O3-x/Cr2O3/Semiconductor Capacitor Using Magneto-Electric Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.350.221 ◽

2007 ◽

Vol 350 ◽

pp. 221-224

Author(s):

Takeshi Yokota ◽

Takaaki Kuribayashi ◽

Takeshi Shundo ◽

Keita Hattori ◽

Yasutoshi Sakakibara ◽

...

Keyword(s):

Dielectric Properties ◽

Magnetic Moment ◽

Floating Gate ◽

Single System ◽

Insulating Layer ◽

Ferromagnetic Properties ◽

Capacitance Voltage ◽

Magnetic And Dielectric Properties ◽

Mis Capacitor ◽

Electric Materials

We investigated the magnetic and dielectric properties of a metal (Pt)/insulator (Cr2O3)/semiconductor (Si) (MIS) capacitor composed of magneto-electric (ME) materials. The capacitor has anti-ferromagnetic properties and a very small electrically induced magnetic moment. It also shows capacitance-voltage (C-V) properties typical of a Si-MIS capacitor without any hysteresis. By inserting a thin Cr2O3-x layer, the C-V curve has a hysteresis window with a clockwise trace, which indicates that electrons have been injected into the Cr2O3-x layer. These results indicate that this MIS capacitor contains a floating gate and an ME insulating layer in a single system.

Download Full-text