Patent number: 6726781
Abstract: A permanent magnet is provided which retains its magnetic properties and exhibits a linear extrinsic demagnetization curve at elevated temperatures up to 700° C. The magnet is represented by the general formula RE(CoWFeVCuXTY)Z, where RE is a rare earth metal selected from the group consisting of Sm, Gd, Pr, Nd, Dy, Ce, Ho, Er, La, Y, Tb, and mixtures thereof and T represents a transition metal(s) selected from the group consisting of Zr, Hf, Ti, Mn, Cr, Nb, Mo, W, V, Ni, Ta, and mixtures thereof.
Type:
Grant
Filed:
September 12, 2002
Date of Patent:
April 27, 2004
Assignees:
University of Dayton, Electron Energy Corporation
Inventors:
Marlin S. Walmer, Christina H. Chen, Shiqiang Liu, Michael H. Walmer, G. Edward Kuhl