Magnetic properties of barium ferrite nanoparticles: Quantitative test of the Stoner–Wohlfarth theory for uniaxial single-domain magnetic particles

2013 ◽  
Vol 377 (38) ◽  
pp. 2659-2662 ◽  
Author(s):  
Hong-yan Duan ◽  
Jun Wang ◽  
Le Li ◽  
Victor Aguilar ◽  
Guo-meng Zhao
Keyword(s):  
Magnetic Properties ◽  
Barium Ferrite ◽  
Magnetic Particles ◽  
Ferrite Nanoparticles ◽  
Single Domain ◽  
Quantitative Test

High-Temperature First-Order-Reversal-Curve (FORC) Study of Magnetic Nanoparticle Based Nanocomposite Materials

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2669-2674
Author(s):  
B. Dodrill ◽  
P. Ohodnicki ◽  
M. McHenry ◽  
A. Leary
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Magnetic Nanoparticle ◽  
Magnetic Particles ◽  
Nanocomposite Materials ◽  
Single Domain ◽  
Magnetic Interactions ◽  
First Order ◽  
Soils And Sediments ◽  
Properties Of Materials

AbstractFirst-order-reversal-curves (FORCs) are an elegant, nondestructive tool for characterizing the magnetic properties of materials comprising fine (micron- or nano-scale) magnetic particles. FORC measurements and analysis have long been the standard protocol used by geophysicists and earth and planetary scientists investigating the magnetic properties of rocks, soils, and sediments. FORC can distinguish between single-domain, multi-domain, and pseudo single-domain behavior, and it can distinguish between different magnetic mineral species [1]. More recently, FORC has been applied to a wider array of magnetic material systems because it yields information regarding magnetic interactions and coercivity distributions that cannot be obtained from major hysteresis loop measurements alone. In this paper, we will discuss this technique and present high-temperature FORC results for two magnetic nanoparticle materials: CoFe nanoparticles dispersed in a SiO2 matrix, and FeCo-based nanocrystalline amorphous/nanocomposites.

Microwave Sintering of Barium Ferrite Nanoparticles Processed via Sol-Gel Method

2012 ◽  
Vol 463-464 ◽  
pp. 1468-1472 ◽  
Author(s):  
Nurhadi S. Waluyo ◽  
Abdulhakim A. Almajid ◽  
Mahmoud A. Soliman
Keyword(s):  
Magnetic Properties ◽  
Barium Ferrite ◽  
Magnetic Measurement ◽  
Microwave Sintering ◽  
Sol Gel ◽  
Sintered Sample ◽  
Ferrite Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Calcination Temperatures

Consolidated barium ferrite nanoparticles were expected to obtain better magnetic properties. Sol-gel method was used to produce the barium ferrite nanoparticles. Various calcination temperatures were set to obtain the single phase structure. XRD pattern and SEM image confirmed the nanoparticles with 48.66 nm and 70 nm, respectively. Compacted samples were sintered using microwave sintering and conventional furnace with various temperature and time. Magnetic measurement test shows that microwave sintered samples have better properties. The highest magnetic properties values for microwave sintered sample is obtained at 950°C for 60 minutes with coercivity (Hc) of 5565 Oersted, remanence (Br) of 1537 Gauss and saturation magnetization (Ms) of 37.04 emu/g.

Temperature and field dependences of transverse relaxivity of Co–Zn ferrite nanoparticles coated with silica: The role of magnetic properties and different regimes

2021 ◽  
Vol 260 ◽  
pp. 124178
Author(s):  
Pavel Veverka ◽  
Lenka Kubíčková ◽  
Zdeněk Jirák ◽  
Vít Herynek ◽  
Miroslav Veverka ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ferrite Nanoparticles ◽  
Zn Ferrite
Sign in / Sign up

Export Citation Format

Share Document