Comparison of magnetic and dielectric properties of transition metal nanospinel ferrites, MFe2O4, (M = Co, Cu, Ni, Zn) synthesized by one-pot combustion route

2021 ◽  
Author(s):  
Bincy Rose Vergis ◽  
Nagaraju Kottam ◽  
R. Hari Krishna ◽  
G.N. Anil Kumar
Keyword(s):  
Dielectric Properties ◽  
Transition Metal ◽  
One Pot ◽  
Combustion Route ◽  
Magnetic And Dielectric Properties

scholarly journals Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

2020 ◽  
Author(s):  
N. Ambikeswari ◽  
S. Manivannan
Keyword(s):  
Graphene Oxide ◽  
Dielectric Properties ◽  
Reduced Graphene Oxide ◽  
Cobalt Ferrite ◽  
Precipitation Method ◽  
One Pot ◽  
Reduced Graphene ◽  
Magnetic And Dielectric Properties ◽  
Co Precipitation ◽  
High Dielectric

Abstract Nickel substituted cobalt ferrite − reduced graphene oxide (NCF-RGO) composite was synthesized using a facile one-pot chemical co-precipitation method. The addition of graphene oxide (GO) leads to the dimensional decrease of NCF nanoparticles (< 10 nm) in the composite, which controls the magnetic and dielectric properties. Nickel with lower ionic radius, compared to cobalt and its substitution in the composite along with the incorporation of GO results in the transition of ferromagnetic to superparamagnetic ordering. A large magnetisation of 51.63 emu/g and a high dielectric constant of 3.92 x 10 6 (at 100 Hz) were also developed from the composite. The conjugated mechanism of magnetic combined electrical property, with a high charge–storing capability and tuneable magnetization, enables its potential use in magnetic flipping or switching devices and data storing systems.

Influence of Ca-Doping on Structural, Magnetic and Dielectric Properties of Ba3Co2-xCaxFe24O41 Hexaferrite Powders

2015 ◽  
Vol 241 ◽  
pp. 226-236 ◽  
Author(s):  
Neha Solanki ◽  
Rajshree B. Jotania
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Sol Gel ◽  
Calcium Content ◽  
Combustion Method ◽  
Dielectric Behavior ◽  
Dielectric Parameters ◽  
Ca Doping ◽  
Auto Combustion ◽  
Magnetic And Dielectric Properties

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

scholarly journals An entry to 2-(cyclobut-1-en-1-yl)-1H-indoles through a cyclobutenylation/deprotection cascade

2021 ◽  
Author(s):  
Philipp Natho ◽  
Zeyu Yang ◽  
Lewis Allen ◽  
Juliette Rey ◽  
Andrew J P White ◽  
...  
Keyword(s):  
Transition Metal ◽  
One Pot ◽  
Metal Free ◽  
Mild Conditions

A transition-metal-free strategy for the synthesis of 2-(cyclobut-1-en-1-yl)-1H-indoles under mild conditions is described herein. A series of substituted 2-(cyclobut-1-en-1-yl)-1H-indoles are accessed by a one-pot cyclobutenylation/deprotection cascade from N-Boc protected indoles....

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

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.

ChemInform Abstract: Transition Metal Free Intramolecular S-Arylation: One-Pot Synthesis of Thiochromen-4-ones.

ChemInform ◽  
2014 ◽  
Vol 45 (13) ◽  
pp. no-no
Author(s):  
T. A. Jenifer Vijay ◽  
Kebbahalli N. Nandeesh ◽  
Goravanahalli M. Raghavendra ◽  
Kanchugarakoppal S. Rangappa ◽  
Kempegowda Mantelingu
Keyword(s):  
Transition Metal ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis
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