Restoring the Co magnetic moments at interfacial Co-porphyrin arrays by site-selective uptake of iron.

Restoring the Co magnetic moments at interfacial Co-porphyrin arrays by site-selective uptake of iron.
复制标题

通过铁的位点选择性吸收恢复界面钴卟啉阵列的钴磁矩

DOI:
10.1021/nn507346x
复制
发表时间:
2015
期刊:
影响因子:
17.1
通讯作者:
J.V. Barth
J.V. Barth
中科院分区:
材料科学1区
文献类型:
--
作者:
S. Vijayaraghavan;W. Auwärter;D. Écija;K. Seufert;S. Rusponi;T. Houwaart;P. Sautet;M. L. Bocquet;P. Thakur;S. Stepanow;U. Schlickum;M. Etzkorn;H. Brune;J.V. Barth

文献摘要

参考文献

相似文献

磁化学最近成为控制表面可寻址自旋阵列的一种很有前途的方法。本文报道了铁在高度规则的Co-四苯基卟啉(Co- tpp)模板上的结合、空间排序和磁性,并强调了铁如何控制Co中心的磁性。通过扫描隧道显微镜(STM)可以证明,单个铁原子在由Co-N-C-C-C-N环亚基定义的七聚体提供的独特配位环境中选择性地附着在鞍形构象上。Co的磁矩在Co- tpp /Ag(111)中被淬灭,而Fe的存在使其恢复。我们的x射线磁性圆二色性(XMCD)实验,辅以密度泛函理论(DFT)计算,证明了Fe和Co中心之间的铁磁耦合伴随着卟啉配体的复杂电荷重分配。因此,我们展示了一种不寻常的金属卟啉配位几何结构,它打开了空间秩序的途径,并在表面纳米结构中设计磁矩。
Magnetochemistry recently emerged as a promising approach to control addressable spin arrays on surfaces. Here we report on the binding, spatial ordering, and magnetic properties of Fe on a highly regular Co-tetraphenylporphyrin (Co-TPP) template and highlight how the Fe controls the magnetism of the Co centers. As evidenced by scanning tunneling microscopy (STM) single Fe atoms attach to the saddle-shape conformers site-selectively in a unique coordination environment offered through a heptamer defined by the Co–N–C–C–C–N cyclic subunit. While the magnetic moment of Co is quenched for bare Co-TPP/Ag(111), the Fe presence revives it. Our X-ray magnetic circular dichroism (XMCD) experiments, complemented by density functional theory (DFT) calculations, evidence a ferromagnetic coupling between the Fe and the Co center concomitant with a complex charge redistribution involving the porphyrin ligand. Thus, we demonstrate an unusual metalloporphyrin coordination geometry that opens pathways to spatially order and engineer magnetic moments in surface-based nanostructures.
DOI: 10.1103/physrevlett.103.087205
发表时间: 2009-07
影响因子: 8.6
作者:
D. Wegner;R. Yamachika;Xiaowei Zhang;Yayu Wang;T. Baruah;M. Pederson;B. Bartlett;J. Long;M. Crommie
通讯作者: D. Wegner;R. Yamachika;Xiaowei Zhang;Yayu Wang;T. Baruah;M. Pederson;B. Bartlett;J. Long;M. Crommie
DOI: 10.1016/s0022-328x(00)82382-7
发表时间: 1966-01-01
影响因子: 2.3
作者:
BOHN, RK;HAALAND, A
通讯作者: HAALAND, A
DOI: 10.1021/nl301534p
发表时间: 2012-07
期刊: Nano letters
影响因子: 10.8
作者:
Saranyan Vijayaraghavan;D. Écija;W. Auwärter;Sushobhan Joshi;K. Seufert;A. Seitsonen;Kentaro Tashiro;J. Barth
通讯作者: Saranyan Vijayaraghavan;D. Écija;W. Auwärter;Sushobhan Joshi;K. Seufert;A. Seitsonen;Kentaro Tashiro;J. Barth
将乙氧基羰基亚甲基部分插入内消旋四苯基卟啉镍 (II) 的 NiN 键中
DOI: --
发表时间: 1975
期刊:
影响因子: --
作者:
H. Callot;T. Tschamber;B. Chevrier;R. Weiss
通讯作者: R. Weiss
DOI: 10.1038/nchem.956
发表时间: 2011-02-01
期刊: NATURE CHEMISTRY
影响因子: 21.8
作者:
Seufert, Knud;Bocquet, Marie-Laure;Barth, Johannes V.
通讯作者: Barth, Johannes V.