Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

被引：26

作者：

Corbetta, Marco ^{[1
]}

Ouazi, Safia ^{[1
]}

Borme, Jerome ^{[1
,2
]}

Nahas, Yasmine ^{[1
]}

Donati, Fabio ^{[1
,3
,4
]}

Oka, Hirofumi ^{[1
]}

Wedekind, Sebastian ^{[1
]}

Sander, Dirk ^{[1
]}

Kirschner, Juergen ^{[1
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] Int Iberian Nanotechnol Lab, P-4715310 Braga, Portugal

[3] Politecn Milan, Dipartimento Energia, I-20133 Milan, Italy

[4] Politecn Milan, NEMAS Ctr NanoEngn Mat & Surfaces, I-20133 Milan, Italy

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 03期

关键词：

SPECTROSCOPY; SURFACE; PROBES;

D O I：

10.1143/JJAP.51.030208

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic properties of bulk Cr tips have been investigated by spin-polarized scanning tunneling spectroscopy (SP-STS). To extract the properties of the Cr tips, we performed low-temperature SP-STS measurements on a well-known model system: nanometric Co islands on Cu(111). Our experiments indicate the existence of uncompensated magnetic moments at the apex of the Cr tips, which rotate in the direction of the applied vertical magnetic field and become aligned with it at approximately 2 T. We extracted a tip spin polarization of 45% at the Fermi energy. We showed that the tip spin polarization can change with a modification of the tip apex. (C) 2012 The Japan Society of Applied Physics

引用

页数：3

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