Investigation of fabrication of Mn-Ga-Al/Fe-Co nanocomposite hard magnetic materials. (6th June 2018)

• Record Type: Journal Article
• Authors: Lam, Nguyen Mau; Thuy, Do Thi; Trang, Pham Ha; Anh, Nguyen Hoai; Luyen, Nguyen Thi; Hien, Nguyen Thi; Truong, Ngo Thi; Thanh, Pham Thi; Yen, Nguyen Hai; Van Duong, Nguyen; Ngoc, Nguyen Huy; Thang, Duong Dinh; Thi, Tran Minh; Dan, Nguyen Huy
• Is Part Of: Advances in natural sciences. Volume 9:Number 2(2018)
• Publication Date: 2018-06-06
• Subjects: nanocomposite hard magnetic material -- exchange-spring magnet -- rare earth-free magnet -- high energy ball milling; 5.02; Nanotechnology -- Periodicals; Nanoscience -- Periodicals; 620.5
• DOI: 10.1088/2043-6254/aac42d
• Languages: English
• ISSNs: 2043-6254

Abstract

Abstract: Mn-Ga-Al/Fe-Co nanocomposite hard magnetic materials were combined from hard magnetic and soft magnetic phases. The nanoparticles of hard and soft magnetic phases were fabricated by using high energy ball milling method with milling times of 8 h and 32 h to have size of about 50 nm and 70 nm, respectively. The hard and soft magnetic phases were then mixed together for 1 h with different weight fractions of soft magnetic phase from 5 to 20%. The nanocomposites show quite good exchange-spring coupling of hard and soft magnetic phases. Saturation magnetization and coercivity of the nanocomposites strongly depend on the weight fraction of the soft magnetic phase. The increases rapidly, while the decreases with increasing the fraction of the soft magnetic phase. With appropriate fabrication conditions, the Mn-Ga-Al/Fe-Co nanocomposites can possess emu g −1 and . Maximum energy products, , above 4 MGOe have been achieved for this kind of rare earth-free hard magnetic materials.