Observation of a complex nanoscale magnetic structure in a hexagonal Fe monolayer

被引：96
作者：
Von Bergmann, K
Heinze, S
Bode, M
Vedmedenko, EY
Bihlmayer, G
Blügel, S
Wiesendanger, R
机构：
[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany
[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.96.167203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have observed a novel magnetic structure in the pseudomorphic Fe monolayer on Ir(111). Using spin-polarized scanning tunneling microscopy we find a nanometer-sized two-dimensional magnetic unit cell. A collinear magnetic structure is proposed consisting of 15 Fe atoms per unit cell with 7 magnetic moments pointing in one and 8 moments in the opposite direction. First-principles calculations verify that such an unusual magnetic state is indeed lower in energy than all solutions of the classical Heisenberg model. We demonstrate that the complex magnetic structure is induced by the strong Fe-Ir hybridization.
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