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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Emergence of noncollinear magnetic ordering in bimetallic Co6-nMnn clusters
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Emergence of noncollinear magnetic ordering in bimetallic Co6-nMnn clusters

机译：双金属Co6-nMnn团簇中非共线磁性排序的出现

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摘要

Using spin-polarized density functional calculations, we have studied the magnetic states including collinear and noncollinear magnetic coupling in bimetallic Co6-nMnn clusters. The ground state of Co6-nMnn clusters displays collinear magnetic ordering for n <= 3, whereas a magnetic transition to noncollinear ordering occurs at n = 4 and the noncollinear magnetic structure remains to be energetically favoured afterwards. Moreover, the total magnetic moment of Co6-nMnn increases with n by 2 mu(B) for n = 0-3 and decreases sharply from n = 3 to n = 4, while the decreasing trend becomes smooth for n = 4-6. The competition of ferromagnetic and antiferromagnetic interactions between the neighbouring magnetic moments induces the emergence of noncollinear magnetic coupling in the small bimetallic clusters.
机译：使用自旋极化密度泛函计算，我们研究了双金属Co6-nMnn团簇中的磁态，包括共线和非共线磁耦合。 Co6-nMnn团簇的基态在n <= 3时显示共线磁性顺序，而在n = 4时发生向非共线顺序的磁性跃迁，此后非共线磁性结构仍有待大力支持。此外，Co6-nMnn的总磁矩在n = 0-3时随n增加2μ（B），并从n = 3急剧下降至n = 4，而对于n = 4-6则下降趋势变得平滑。相邻磁矩之间的铁磁和反铁磁相互作用的竞争诱导了小双金属簇中非共线磁耦合的出现。

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