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.
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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
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发表时间:
2015
期刊:
影响因子:
17.1
通讯作者:
J.V. Barth
中科院分区:
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
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.
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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
影响因子:
2.3
作者:
BOHN, RK;HAALAND, A
通讯作者:
HAALAND, A
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
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
影响因子:
21.8
作者:
Seufert, Knud;Bocquet, Marie-Laure;Barth, Johannes V.
通讯作者:
Barth, Johannes V.