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通过定向凝固制备<110>和<112>方向的Tb0.3Dy0.7Fe1.82合金,研究了磁场和压力对合金动态耦合系数的影响。结果表明,合金的动态耦合系数值随着磁场强度的增加而先增加后减小,在300~500 Oe范围内达到最大。当外界施加的压力为10 MPa时,合金的动态耦合系数达到最大,继续增大压力其值减小。热处理后合金的动态耦合系数在10MPa压力和480 Oe磁场强度下达到了0.62。
Tb0.3Dy0.7Fe1.82 alloy in the direction of <110> and <112> was prepared by directional solidification. The effect of magnetic field and pressure on the dynamic coupling coefficient of the alloy was investigated. The results show that the dynamic coupling coefficient increases firstly and then decreases with the increase of the magnetic field intensity, reaching the maximum in the range of 300-500 Oe. When the pressure applied by the outside world is 10 MPa, the dynamic coupling coefficient of the alloy reaches its maximum, and its value decreases as the pressure continues to increase. After heat treatment, the dynamic coupling coefficient of the alloy reaches 0.62 under 10MPa pressure and 480 Oe magnetic field.