Influence of annealing temperature on the formation, microstructure and magnetic properties of spinel nanocrystalline cobalt ferrites

2010 ◽  
Vol 10 (1) ◽  
pp. 284-288 ◽  
Author(s):  
Lunhong Ai ◽  
Jing Jiang
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperature ◽  
Cobalt Ferrites ◽  
Microstructure And Magnetic Properties

Microstructure and magnetic properties in percolating (Ni–Fe)x(SiO2)1–x granular films

1996 ◽  
Vol 11 (10) ◽  
pp. 2506-2517 ◽  
Author(s):  
Y. Xu ◽  
X. Yan
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Particles ◽  
Annealing Temperature ◽  
Volume Fraction ◽  
Volume Ratio ◽  
Metal Insulator ◽  
Composition Structure ◽  
Enhanced Surface ◽  
Microstructure And Magnetic Properties

We studied composition, structure, microstructure, and magnetic properties of percolating (Ni–Fe)x(SiO2)1−x granular thin films. We found that the magnetic susceptibility increases and the coercivity decreases when increasing x toward xt, the critical metallic volume fraction for the metal-insulator transition, and the susceptibility decreases and the coercivity increases when increasing annealing temperature for x just below xt. Comparison of the microstructure and the magnetic properties suggests that the enhanced magnetic susceptibility for x just below xt is probably associated with the labyrinthine structure of the granular magnetic particles where there is an enhanced surface-to-volume ratio of the magnetic particles.

Effect of Annealing Temperature on the Microstructure and Magnetic Properties of MnGa Films

2016 ◽  
Vol 29 (8) ◽  
pp. 2035-2039
Author(s):  
Weiming Cheng ◽  
Shize Jiang ◽  
Wenchao Xu ◽  
Yajuan Hui ◽  
Haiwei Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperature ◽  
Microstructure And Magnetic Properties

Microstructure and Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Prepared by HDDR Combined with Mechanical Milling

2007 ◽  
Vol 534-536 ◽  
pp. 1349-1352 ◽  
Author(s):  
Lian Xi Hu ◽  
Erde Wang ◽  
Bin Guo ◽  
Gang Shi
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Mechanical Milling ◽  
Annealing Temperature ◽  
Nominal Composition ◽  
Annealed Alloy ◽  
Bonded Magnet ◽  
Nanocomposite Powders ◽  
Recombination Kinetics ◽  
Microstructure And Magnetic Properties

Nd2Fe14B/α-Fe nanocomposite powders with a nominal composition of Nd12Fe82B6 were prepared by HDDR combined with mechanical milling. The microstructure of both the as-disproportionated and the subsequently desorption-recombination annealed alloy powders was studied by Mössbauer spectrometry and TEM. The magnetic properties were investigated by VSM using bonded magnet samples. The results showed that the annealing temperature had significant influence on both the recombination kinetics and the grain size of the Nd2Fe14B/α-Fe nanocomposite phases, and the bonded magnet samples presented the best magnetic properties when the nanocomposite powders were prepared by annealing at 760°C for 30 min.

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