Crystallographic Structural and Magnetic Properties of FePt Nanoparticles

• Main Authors: Nguyen, Thi Thanh Van, Trương, Thanh Trung, Nguyen, Hoang Nam, Nguyen, Hoang Luong
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2017
• Subjects: FePt nanoparticles; coercivity; squareness; annealing temperature; sonochemistry
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/56080
• Institution: Vietnam National University, Hanoi

Fe60Pt40 nanoparticles have been successfully prepared by sonochemistry method from the solution of Fe(C2H3O2)2 and H2PtCl6. The as-prepared sample then has been annealed at temperatures from 450oC to 650oC. Annealed samples have ordered L1o phase with face-centered tetragonal (fct) structure and show hard magnetic properties. The nanoparticles annealed at 550oC show highest coervicity of 4.36 kOe measured at room temperature. The annealed-temperature dependence of the coercivity is consistent with the appearance of the order phase L1o in the samples.