RARE EARTH PERMANENT MAGNETIC MATERIAL AND METHOD OF PREPARING THE SAME

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A rare earth permanent magnetic material contains a main phase of R1x1R2y1Fe1-x1-y1-z1-u1Coz1Bu1, and an auxiliary phase including a first auxiliary phase of R3x2R4y2Fe1-x2-y2-z2-u2-v1Coz2Bu2Mv1 and a second auxiliary of R5x3R6y3Fe1-x3-y3-z3-u3-v2Coz3Bu3Mv2. Each of R1, R3 and R5 is Pr and/or Nd. Each of R2, R4 and R6 is at least one of Dy, Tb and Ho. M is at least one of Zr, Ga, Cu, Nb, Sn, Mo, Al, V, W, Si, Hf, Ti, Zn, Bi, Ta and In. 26 wt %≦x1+y1≦34 wt %, 0.01 wt %≦y1≦4 wt %, 0≦z1≦6 wt %, and 0.78 wt %≦u1≦1.25 wt %. 35 wt %≦x2+y2≦82 wt %, 5 wt %≦y2≦42 wt %, 0≦z2≦40 wt %, 0≦u2≦1.25 wt %, and 0≦v1≦10 wt %. 10 wt %≦x3+y3≦32 wt %, 0≦y3≦4.8 wt %, 0≦z3≦40 wt %, 0≦u3≦1.25 wt %, and 31 wt %≦v2≦50 wt %.