Eur. Phys. J. Appl. Phys. (2013) 64: 10403
https://doi.org/10.1051/epjap/2013130010

Hard magnetic properties of FePd nanoparticles^*

¹ Center for Materials Science, Department of Physics, Hanoi University of Science, VNU, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
² Nano and Energy Center, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam

^a e-mail: namnh@hus.edu.vn

Received: 3 January 2013
Revised: 21 June 2013
Accepted: 12 July 2013
Published online: 4 October 2013

Abstract

Magnetic nanoparticles Fe_xPd_100−x (x = 42, 50, 55, 60, 63) with small size of around 5–10 nm were prepared by sonochemistry from palladium acetate and iron acetate. The compositions x can be controlled by changing the ratio of the above precursor chemicals. Under the effect of annealing at various temperatures from 450 °C to 650 °C, structure change was observed and samples show hard magnetic properties with high coercivity up to 2.1 kOe. Magnetic properties of samples were then systematically discussed in dependence of x and annealing temperatures.