Optical and magnetic properties of cobalt(2+) ions in dried and heated silica gels prepared by the sol-gel process

1991 ◽  
Vol 95 (20) ◽  
pp. 7595-7598 ◽  
Author(s):  
Kazuo Kojima ◽  
Hajime Taguchi ◽  
Jiro Matsuda
Keyword(s):  
Magnetic Properties ◽  
Sol Gel ◽  
Silica Gels ◽  
Sol Gel Process ◽  
Optical And Magnetic Properties

scholarly journals Structure, microstructure, optical and magnetic properties of cobalt aluminate nanopowders obtained by sol-gel process

2020 ◽  
Vol 542 ◽  
pp. 120115 ◽  
Author(s):  
Y. El Jabbar ◽  
H. Lakhlifi ◽  
R. El Ouatib ◽  
L. Er-Rakho ◽  
S. Guillemet-Fritsch ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Sol Gel ◽  
Cobalt Aluminate ◽  
Sol Gel Process ◽  
Optical And Magnetic Properties

Effect of Annealing temperature on the Structural and Magnetic Properties of TbxY3-xFe5O12(x = 0.0, 1.0, 2.0) Thin Films Prepared by Sol-Gel Process

2012 ◽  
Vol 501 ◽  
pp. 236-241 ◽  
Author(s):  
Ftema W. Aldbea ◽  
Noor Bahyah Ibrahim ◽  
Mustafa Hj. Abdullah ◽  
Ramadan E. Shaiboub
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Vibrating Sample Magnetometer ◽  
X Ray ◽  
Garnet Phase ◽  
Sol Gel Process ◽  
Amorphous Structures

Thin films nanoparticles TbxY3-xFe5O12 (x=0.0, 1.0, 2.0) were prepared by the sol-gel process followed by annealing process at various annealing temperatures of 700° C, 800° C and 900° C in air for 2 h. The results obtained from X-ray diffractometer (XRD) show that the films annealed below 900°C exhibit peaks of garnet mixed with small amounts of YFeO3 and Fe2O3. Pure garnet phase has been detected in the films annealed at 900°C. Before annealing the films show amorphous structures. The particles sizes measurement using the field emission scanning electron microscope (FE-SEM) showed that the particles sizes increased as the annealing temperature increased. The magnetic properties were measured at room temperature using the vibrating sample magnetometer (VSM). The saturation magnetization (Ms) of the films also increased with the annealing temperature. However, different behavior of coercivity (Hc) has been observed as the annealing temperature was increased.

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