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Gold nanotube encapsulation enhanced magnetic properties of transitionmetal monoatomic chains: An ab initio study

机译:金纳米管封装增强过渡金属单原子链的磁性:从头算研究

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摘要

The magnetic properties of gold nanotubes encapsulated transition metal (TM, TM=Co and Mn)and monoatomic chains (TM@Au) are studied using first-principles density functional calculations.The TM chains are significantly stabilized by the gold nanotube coating. TM–TMdistance-dependent ferromagnetic-antiferromagnetic phase transition in TM @ Au is observed andcan be understood by Ruderman–Kittel–Kasuya–Yosida (RKKY) model. The magnetocrystallineanisotropy energies of the TM@Au tubes are dramatically enhanced by one order of magnitudecompared to those of free TM chains. Furthermore, the stronger interaction between Mn chain andgold nanotube even switches the easy magnetization axis along the tube.
机译:利用第一原理密度泛函计算研究了金纳米管包裹的过渡金属(TM,TM = Co和Mn)和单原子链(TM @ Au)的磁性能,金纳米管涂层显着稳定了TM链。观察到TM @ Au中TM–TM距离相关的铁磁-反铁磁相变,并且可以通过Ruderman–Kittel–Kasuya–Yosida(RKKY)模型来理解。与自由TM链相比,TM @ Au管的磁晶各向异性能显着提高了一个数量级。此外,Mn链与金纳米管之间更强的相互作用甚至切换了沿管的易磁化轴。

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