【摘要】 研究了Sm₂（Co Cu Fe zr）₁₇,材料的剩磁B_r,、内禀矫顽力iH_c随温度的变化关系,研究了材料在不同温度条件下的磁通可逆损失和不可逆损失,随着材料内禀矫顽力iH_c的增大,可逆损失和不可逆损失都明显减小,最后采用了畴壁位移理论解释了磁性能随温度衰变的机制,提高材料的内禀矫顽力是提高材料温度稳定性的有效途径。更多还原

【Abstract】 The relationship between temperature variation and the value of remanence B_r, intrinsic coervisty _iH_c of Sm₂ （ Co Cu Fe Zr）₁₇ type permanent magnets was invatigated. The reversible flux loss and the irreversible flux loss at different temperature were presented seperately. The reversible flux loss and the irreversible flux loss decrease obviously with the temperature increasing. At last, the magnetic properties variation mechanism was studied with the domain wall displacement theory. It is found that increasing intrinsic coersivity is an effective way to increase operating temperature.更多还原