Coercivity Mechanism of (Nd_0.8Ce_0.2)_2.4Fe₁₂Co₂B Ribbons with Ferromagnetic Grain Boundary Phase.

ABSTRACT: Understanding the coercivity mechanism has had a substantial impact on developing economically more attractive RE-based (RE = rare earth) permanent materials because of price volatility of key RE metals (i.e., Nd and Dy) in recent years. In this work, we investigated the microstructure and magnetic properties of melt-spun (Nd_0.8Ce_0.2)_2.4Fe₁₂Co₂B ribbons and annealed samples at 773 K for 15 min with 1 Tesla (T) magnetic field to better understand the coercivity mechanism. We found hard magnetic grains were surrounded by thin and continuous layers along the grain boundaries (GBs) with a high concentration of ferromagnetic elements (Fe + Co >74 at%). The obvious positive peak in the δM plot and the interaction domain structure observed by Lor

SUBMITTER: Li H 

PROVIDER: S-EPMC5615716 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature