Quantum phase interference and Néel-vector tunneling in antiferromagnetic molecular wheels.
Quantum phase interference and Néel-vector tunneling in antiferromagnetic molecular wheels.
复制标题
反铁磁分子轮中的量子相位干涉和尼尔矢量隧道效应。
DOI：
10.1103/physrevlett.102.157202
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发表时间：
2009
影响因子：
8.6
通讯作者：
H. Mutka
中科院分区：
文献类型：
--
作者：
Oliver Waldmann;T. Stamatatos;G. Christou;H. Güdel;Ilya Sheikin;H. Mutka
用磁矩、磁化强度和非弹性中子散射研究了18个交换耦合Fe；{III}离子的反铁磁性分子轮Fe18。综合数据表明，半经典理论揭示的Néel矢量隧穿(NVT)假说非常准确地描述了Fe18的低温磁性。此外，磁矩随外加磁场的变化呈现振荡，反映了量子位相干涉引起的NVT分裂与场的振荡。
The antiferromagnetic molecular wheel Fe18 of 18 exchange-coupled Fe;{III} ions has been studied by magnetic torque, magnetization, and inelastic neutron scattering. The combined data show that the low-temperature magnetism of Fe18 is very accurately described by the Néel-vector tunneling (NVT) scenario, as unfolded by semiclassical theory. In addition, the magnetic torque as a function of applied field exhibits oscillations that reflect the oscillations in the NVT splitting with field due to quantum phase interference.