Title :
Development of Hysteresis in Ball-Milled LaCo5-xFex and La2Co7-xFex
Author :
Tozman, P. ; Venkatesan, M. ; Coey, J.M.D.
Author_Institution :
Sch. of Phys., Trinity Coll., Dublin, Ireland
Abstract :
The magnetic and structural properties of bulk, ball-milled La(Co5-xFex), and ball-milled La2(Co7-xFex) were studied. The highest coercivity (1.08 T) was obtained at room temperature for ball-milled LaCo4.8Fe0.2 after annealing in a preheated furnace at 800 °C for 3 min and subsequently quenching. Iron doping up to x = 1 increased the saturation magnetization by up to 20% without any deterioration of coercivity. For La2(Co7-xFex), the highest coercivity (1.2 T) at room temperature and (1.92 T) at 4 K was obtained for ball-milled La2Co7 after annealing in the preheated furnace at 850 °C for 3 min and subsequently quenching. Unlike Fe-doped LaCo5, iron doping in La2Co7 did not enhance the saturation magnetization.
Keywords :
annealing; ball milling; cobalt alloys; coercive force; doping; iron alloys; lanthanum alloys; magnetic hysteresis; magnetic particles; powders; quenching (thermal); LaCo5-xFex; LaCo7-xFex; annealing; ball milling; coercivity; iron doping; magnetic hysteresis; magnetic properties; preheated furnace; quenching; saturation magnetization; structural properties; temperature 293 K to 298 K; temperature 4 K; temperature 800 degC; temperature 850 degC; time 3 min; Annealing; Coercive force; Iron; Magnetic hysteresis; Powders; Saturation magnetization; Coercivity; M??ssbauer spectrum; X-ray diffraction (XRD); magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2316914
