Control of magneto-optical properties of cobalt-layers by adsorption of α-helical polyalanine self-assembled monolayers,Journal of Materials Chemistry C

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Control of magneto-optical properties of cobalt-layers by adsorption of α-helical polyalanine self-assembled monolayers
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-07-28 , DOI: 10.1039/d0tc02734k
Apoorva Sharma _{1,

2,

3,

4} , Patrick Matthes _{3,

4,

5} , Ivan Soldatov _{4,

6,

7,

8,

9} , Sri Sai Phani Kanth Arekapudi _{1,

2,

3,

4} , Benny Böhm _{1,

2,

3,

4,

10} , Marina Lindner _{1,

2,

3,

4} , Oleksandr Selyshchev _{1,

2,

3,

4} , Nguyen Thi Ngoc Ha _{1,

2,

3,

4} , Michael Mehring _{2,

3,

10,

11,

12} , Christoph Tegenkamp _{1,

2,

3,

4} , Stefan E Schulz _{3,

4,

5} , Dietrich R. T. Zahn _{1,

2,

3,

4,

10} , Yossi Paltiel _{13,

14,

15,

16,

17} , Olav Hellwig _{1,

2,

3,

4,

10} , Georgeta Salvan _{1,

2,

3,

4,

10}

Affiliation

Institute of Physics
Chemnitz University of Technology
09126 Chemnitz
Germany
Fraunhofer Institute for Electronic Nanosystems
Leibniz Institute for Solid State and Materials Research (IFW) Dresden
01069 Dresden
Ural Federal University
Institute of Natural Sciences and Mathematics
Center for Materials
Architecture
and Integration of Nanomembranes (MAIN)
Department of Applied Physics
Hebrew University of Jerusalem
Jerusalem
Israel
Israel Center for Nanoscience and Nanotechnology

The adsorption of chiral molecules was recently shown to trigger a change in the magnetisation of mesoscopic magnetic domains in a ferromagnetic underlayer. In this work, we investigated the macroscopic (magneto-)optical response of chemisorbed α-helical polyalanine self-assembled monolayers (SAMs) on a gold and gold-capped-cobalt thin film on Au substrates using spectroscopic ellipsometry and magneto-optical Kerr effect spectroscopy and microscopy. The optical and magneto-optical spectra reveal selective chemisorption of the α-helical polyalanine molecules depending on the orientation of the substrate remanent magnetisation during the SAMs process. Moreover, a sign change of the magneto-optical response was observed in some of the magnetic substrates after the chiral SAMs formation.

中文翻译：

通过吸附α-螺旋聚丙氨酸自组装单层控制钴层的磁光性能

最近显示，手性分子的吸附会触发铁磁底层中介观磁畴的磁化强度变化。在这项工作中，我们使用光谱椭圆偏振法和磁光克尔效应研究了金和金封金钴薄膜上化学吸附的α-螺旋聚丙氨酸自组装单分子膜（SAMs）的宏观（磁）光学响应光谱学和显微术。光学和磁光光谱揭示了SAMs过程中取决于衬底剩余磁化方向的α-螺旋聚丙氨酸分子的选择性化学吸附。此外，在手性SAM形成后，在一些磁性基板中观察到磁光响应的符号变化。

更新日期：2020-09-03

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