薄膜探针尖端内原子非共线磁性的实验证据。

Experimental evidence for intra-atomic noncollinear magnetism at thin film probe tips.

作者信息

Bode M, Pietzsch O, Kubetzka A, Heinze S, Wiesendanger R

机构信息

Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.

出版信息

Phys Rev Lett. 2001 Mar 5;86(10):2142-5. doi: 10.1103/PhysRevLett.86.2142.

DOI:10.1103/PhysRevLett.86.2142

PMID:11289875

Abstract

The energy-dependent spin-density orientation (SDO) at the apex of thin magnetic film tips is studied by spin-polarized scanning tunneling spectroscopy (SP-STS) at different bias voltages. At most energies the SDO is collinear with the tip magnetization resulting in a domain or domain-wall contrast in SP-STS images of out-of-plane magnetized samples measured with Gd or Fe coated tips, respectively. For some bias voltages, however, the SDO of the tip is found to be almost perpendicular to its magnetization. This result is explained in terms of intra-atomic noncollinear magnetism.

摘要

通过在不同偏置电压下的自旋极化扫描隧道谱（SP-STS）研究了薄磁膜尖端顶点处的能量依赖自旋密度取向（SDO）。在大多数能量下，SDO与尖端磁化强度共线，分别在用Gd或Fe涂层尖端测量的面外磁化样品的SP-STS图像中产生畴或畴壁对比度。然而，对于某些偏置电压，发现尖端的SDO几乎与其磁化强度垂直。该结果根据原子内非共线磁性进行了解释。