The anisotropic first-neighbour contribution to the hyperfine field in hexagonal-close-packed Co: a nuclear magnetic resonance study of diluted alloys and multilayers
作者:M Malinowska、C Mény、E Jedryka、P Panissod
DOI:10.1088/0953-8984/10/22/016
日期:1998.6.8
shell of Co, because hcp Co departs from the ideal compact structure. From the results on Co/Cr and Co/Ru multilayers it is deduced that the impurity neighbours out of the c-plane depress the Co hyperfine field less than the in-plane impurity neighbours. Comparison with the alloys CoCr and CoRu suggests a similar conclusion for CoMn alloys. As to CoCu systems, the situation is the opposite, although there
核磁共振已在杂质浓度低于 1 at.% 的 CoCr、CoRu、CoMn 和 CoCu 六方合金以及存在于相应 Co/M 多层界面的二维合金中进行了研究,其中 Co 采用 hcp 结构。所有研究的合金都观测到两颗低频卫星,而立方合金只观测到一颗。它们的起源与 Co 的第一个配位壳中存在两个不等价的位点有关,因为 hcp Co 偏离了理想的紧凑结构。从 Co/Cr 和 Co/Ru 多层膜的结果可以推断,c 面外的杂质邻居比面内杂质邻居对 Co 超精细场的抑制要小。与合金 CoCr 和 CoRu 的比较表明 CoMn 合金的类似结论。对于 CoCu 系统,情况正好相反,