Synthesis and magnetostrictive properties of Pr(Fe_(1.95)B_(0.05))_(1.93) bulk nanocrystalline alloy

摘要

The structure, magnetic properties, and magnetostriction of Pr(Fe_(1.95)B_(0.05))_(1.93) alloys prepared by annealing its precursor amorphous ribbons under high pressure were investigated. It was found that Pr(Fe_(1.95)B_(0.05))_(1.93) single cubic Laves phase could be obtained only when the pressure is up to 3 GPa. The average grain size about 20 nm is found in the sample synthesized under 6 GPa. A large linear magnetostriction of 541 ppm at 3 kOe is observed in the Pr(Fe_(1.95)B_(0.05))_(1.93) compound synthesized under 6 GPa, which is 25% larger than that under 3 GPa. The present work offers an effective method to obtain bulk nanocrystalline magnetostrictive compounds.