Synthesis of magnetically exchange coupled SrFe12O19/FeCo composites through cryogenic ball milling. (21st July 2017)

• Record Type: Journal Article
• Authors: Pang, Ning; Ye, Feng; Jiang, Ying
• Is Part Of: Materials research express. Volume 4:Number 7(2017)
• Publication Date: 2017-07-21
• Subjects: hexagonal strontium ferrite -- iron cobalt alloy -- nanoparticles -- cryogenic -- ball milling; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa7654
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: SrFe12 O19 /FeCo composite particles with different mass ratios of SrFe12 O19 to FeCo were synthesized through a cryogenic ball milling process. The corresponding products were characterized with scanning electron microscopy (SED), transmission electron microscopy (TEM), x-ray diffraction (XRD) and vibrating sample magnetometer (VSM) for crystal morphology, elemental distribution, crystal phases, and magnetic properties. The results showed that when the mass percentage of FeCo was less than 15%, smooth magnetic hysteresis loops could be obtained from SrFe12 O19 /FeCo composite particles, indicating effective magnetic exchange coupling between the SrFe12 O19 and FeCo particles. A further FeCo mass increase resulted in kinks in the magnetic hysteresis loop and destroyed the magnetic exchange coupling. As a comparison, room temperature ball milling of SrFe12 O19 /FeCo (95/5 wt%) cannot achieve magnetic exchange coupling between SrFe12 O19 and FeCo due to FeCo nanoparticle agglomeration.