Abnormal Coercivity Enhancement in Hybrid Nanograin Pr2(Fe, Co)14B/Pr(Co,Fe)5 Magnets

Author

Shen, Y. ; He, Y. ; Huang, M. ; Lee, D. ; Bauser, S. ; Higgings, A. ; Chen, C. ; Liu, S.

Author_Institution

FutureTek USA Corp., Dayton

fYear

2006

fDate

8-12 May 2006

Firstpage

913

Lastpage

913

Abstract

The thermomagnetic analysis of a hybrid Pr₂(Fe,Co)₁₄B/Pr(Co,Fe)₅ magnet has revealed that two major events take place at 505degC and 975degC. Most likely, the 505degC event is the Curie temperature of a main phase, while the 975degC event is the Curie temperature of a minor phase. In addition, a few minor events were detected at 313, 772, and 872degC, indicating that hybrid magnets may have complex phase structures. Unfortunately, experiment showed that the partial substituting Fe for Co in PrCo₅ sharply decreases the intrinsic coercivity of PrCo₅, leading to very poor energy product a PrCo₅ magnet.

Keywords

Curie temperature; boron alloys; cobalt alloys; coercive force; iron alloys; nanostructured materials; praseodymium alloys; thermomagnetic effects; Curie temperature; Pr₂Co₁₄B-PrFe₅; Pr₂Fe₁₄B-PrCo₅; coercivity; complex phase structures; hybrid nanograin magnets; temperature 313 C; temperature 505 C; temperature 772 C; temperature 872 C; temperature 975 C; thermomagnetic analysis; Amorphous materials; Anisotropic magnetoresistance; Coercive force; Iron; Magnetic analysis; Magnets; Powders; Saturation magnetization; Temperature; Thermal stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.374944

Filename

4262346