Molecular quantum spintronics: supramolecular spin valves based on single-molecule magnets and carbon nanotubes.
Molecular quantum spintronics: supramolecular spin valves based on single-molecule magnets and carbon nanotubes.
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DOI：
10.3390/ijms12106656
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发表时间：
2011
影响因子：
5.6
通讯作者：
Wernsdorfer W
中科院分区：
文献类型：
--
作者：
Urdampilleta M;Nguyen NV;Cleuziou JP;Klyatskaya S;Ruben M;Wernsdorfer W
我们建立了新的混合器件，由化学气相沉积(CVD)生长的碳纳米管(CNT)晶体管组成，装饰着TbPc2(Pc=酞菁)稀土基单分子磁体(SMM)。起草是通过剪裁碳纳米管和SMM之间的超分子π-π相互作用实现的。磁阻磁滞回线的测量显示出陡峭的台阶，这与单个SMM的磁化反转有关。事实上，我们确定了这些器件的电子输运性质强烈地依赖于接枝的SMM的相对磁化取向。SMM在碳纳米管电子传导通道上起着局域自旋偏振器和分析器的作用。结果，我们测得的磁阻比高达几百%。我们利用这种自旋阀效应证实了孤立的TbPc2 SMM的强单轴各向异性和超顺磁性阻塞温度(Tb~1K)。首次确定了分子自旋阀几何构型的不同SMM之间的交换作用强度。我们的结果介绍了一种利用单个SMM的量子效应来设计可操作的分子自旋电子器件的新方案。
We built new hybrid devices consisting of chemical vapor deposition (CVD) grown carbon nanotube (CNT) transistors, decorated with TbPc2 (Pc = phthalocyanine) rare-earth based single-molecule magnets (SMMs). The drafting was achieved by tailoring supramolecular π-π interactions between CNTs and SMMs. The magnetoresistance hysteresis loop measurements revealed steep steps, which we can relate to the magnetization reversal of individual SMMs. Indeed, we established that the electronic transport properties of these devices depend strongly on the relative magnetization orientations of the grafted SMMs. The SMMs are playing the role of localized spin polarizer and analyzer on the CNT electronic conducting channel. As a result, we measured magneto-resistance ratios up to several hundred percent. We used this spin valve effect to confirm the strong uniaxial anisotropy and the superparamagnetic blocking temperature (TB ~ 1 K) of isolated TbPc2 SMMs. For the first time, the strength of exchange interaction between the different SMMs of the molecular spin valve geometry could be determined. Our results introduce a new design for operable molecular spintronic devices using the quantum effects of individual SMMs.
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影响因子：
17.1
作者：
Lopes, Manuel;Candini, Andrea;Bendiab, Nedjma
通讯作者：
Bendiab, Nedjma
影响因子：
4.6
作者：
Ishikawa, N;Sugita, M;Kaizu, Y
通讯作者：
Kaizu, Y
影响因子：
64.8
作者：
Xiong, ZH;Wu, D;Shi, J
通讯作者：
Shi, J
影响因子：
29.4
作者：
Margheriti, Ludovica;Chiappe, Daniele;Sessoli, Roberta
通讯作者：
Sessoli, Roberta
影响因子：
41.2
作者：
Urdampilleta, M.;Klyatskaya, S.;Wernsdorfer, W.
通讯作者：
Wernsdorfer, W.