Giant magnetization canting due to symmetry breaking in zigzag Co chains on Ir(001)

被引：19

作者：

Dupe, B. ^{[1
]}

Bickel, J. E. ^{[2
]}

Mokrousov, Y. ^{[3
,4
,5
]}

Otte, F. ^{[1
]}

Bergmann, Kvon ^{[2
]}

Kubetzka, A. ^{[2
]}

Heinze, S. ^{[1
]}

Wiesendanger, R. ^{[2
]}

机构：

[1] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

[2] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[3] Peter Grunberg Inst, D-52425 Julich, Germany

[4] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[5] JARA, D-52425 Julich, Germany

来源：

NEW JOURNAL OF PHYSICS | 2015年 / 17卷

关键词：

spin polarized STM; first principle calculations; magnetism; SCANNING TUNNELING MICROSCOPE; ATOMIC-SCALE; EXCHANGE; SURFACE;

D O I：

10.1088/1367-2630/17/2/023014

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a canted magnetization of biatomic zigzag Co chains grown on the (5 x 1) reconstructed Ir(001) surface using density functional theory (DFT) calculations and spin-polarized scanning tunneling microscopy (SP-STM) experiments. It is observed by STM that biatomic Co chains grow in three different structural configurations. Our DFT calculations show that they are all in a ferromagnetic (FM) state. Two chain types possess high symmetry due to two equivalent atomic strands and an easy magnetization direction that is along one of the principal crystallographic axes. The easy magnetization axis of the zigzag Co chains is canted away from the surface normal by an angle of 33 degrees. This giant effect is caused by the broken chain symmetry on the substrate in combination with the strong spin-orbit coupling of Ir. SP-STM measurements confirm the stable FM order of the zigzag chains with a canted magnetization.

引用

页数：9

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