摘要:
本文介紹了利用克爾磁光效應(yīng)觀察(Sm Gd Er)Co5的磁疇結(jié)構(gòu),研究了兩個內(nèi)稟矯頑力相差較大的樣品在分級磁化和退磁過程中磁疇結(jié)構(gòu)的變化。結(jié)果表明,該材料的矯頑力主要受成核機制的控制。因此,為了提高磁體的性能,就應(yīng)當(dāng)抑制早期反磁化核的生成,為此,就要求保持成份精確、均勻,提高磁體的致密度,減少雜質(zhì)、孔洞等缺陷,使磁疇取向盡可能一致。
Abstract:
A study of the magnetic domain structure of (Sm, Gd, Er)Co5 magnet by magneto-optical Kerr effect is presented. Two samples with different intrinsic eoercive forces are compared one another in their variations in the domain structure during different stages of magnetization and demagnetization.The results indicate that the coercivity of the magnet made of this kind of magnetic material is mainly controlled by nucleation mechanism. Hence, to improve its magnetic properties, the reversal magnetized nucleation must be restrained. In practise, it can be done by keeping the composition of magnetic materials accurate and homogeneous, increasing the density of the magnet, decreasing the content of impurity and hole, etc.
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