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The <110>-oriented Tb_(0.3)Dy_(0.7)Fe_(1.95) polycrystalline alloy was magnetically annealed, and its influence on jump effect of magnetostriction was investigated. In the vacuum superconductive high magnetic field equipment, <110>-oriented Tb_(0.3)Dy_(0.7)Fe_(1.95) polycrystalline alloy of the directional solidification was annealed at 623 and 723 K for 5 min under the magnetic field vertical to specimen axis. It is found that magnetic annealing can enhance the jump effect under compressive stress, and increase the saturated magnetostriction coefficient λ_s, the λ_s of the magnetic annealing specimens at 623 K under 8.1 MPa is attained to 1950×10 -6 . Magnetic annealing increases the maximum of dynamic magnetostriction coefficient, d max _ 33 , as well as the magnetic field for d max_(33) under 8.1 MPa.
In <110> -oriented Tb_ (0.3) Dy_ (0.7) Fe_ (1.95) polycrystalline alloy was magnetically annealed, and its influence on jump effect of magnetostriction was investigated. In the vacuum superconductive high magnetic field equipment, <110> -oriented Tb_ (0.3) Dy 0.7 Fe 1.95 polycrystalline alloy of the directional solidification was annealed at 623 and 723 K for 5 min under the magnetic field vertical to specimen axis. It is found that magnetic annealing can enhance the jump effect under compressive stress , and increase the saturation magnetostriction coefficient λ_s, the λ_s of the magnetic annealing specimens at 623 K under 8.1 MPa is attained to 1950 × 10 -6. Magnetic annealing increases the maximum of dynamic magnetostriction coefficient, d max _ 33, as well as the magnetic field for d max - (33) under 8.1 MPa.