DocumentCode :
52166
Title :
Magnetic Properties of Annealed 
Powders Prepared By Mechanical Alloying
Author :
Do Hung Manh ; Do Khanh Tung ; Dao Nguyen Hoai Nam ; Le Van Hong ; Pham Thanh Phong ; Nguyen Xuan Phuc
Author_Institution :
Inst. of Mater. Sci., Hanoi, Vietnam
Volume :
50
Issue :
6
fYear :
2014
fDate :
Jun-14
Firstpage :
1
Lastpage :
4
Abstract :
Fe-Co alloy powders were prepared by mechanical alloying of the elemental Fe and Co powders in air and subsequently annealed at various temperatures. Structural and magnetic characteristics of the annealed powders were studied in detail as a function of annealing temperatures by using an X-ray diffractometer (XRD), a field emission scanning electron microscope, a vibrating sample magnetometer, and a physical property measurement system. The XRD results showed an existence of the nanocrystals with sizes of 15-50 nm. The magnetic studies indicated a strong increase of magnetization and a sharp decrease of coercivity as annealing temperature increased. Both the effect of the oxidation on the magnetic properties as well as magnetization stability of the annealed samples will be discussed.
Keywords :
X-ray diffraction; annealing; cobalt alloys; coercive force; field emission electron microscopy; iron alloys; magnetic particles; mechanical alloying; nanofabrication; nanomagnetics; nanoparticles; oxidation; scanning electron microscopy; Fe65Co35; X-ray diffractometry; XRD; annealing temperature; coercivity; elemental cobalt powders; elemental iron powders; field emission scanning electron microscopy; iron-cobalt powders; magnetic characteristics; magnetic properties; magnetization; magnetization stability; mechanical alloying; nanocrystal size; oxidation effect; physical property measurement system; size 15 nm to 50 nm; structural characteristics; vibrating sample magnetometry; Annealing; Magnetic properties; Magnetization; Metals; Milling; Powders; Temperature measurement; Coercivity; Fe-Co; magnetic hysteresis; mechanical alloying (MA);
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2014.2303078
Filename :
6832875
Link To Document :
