Tuning Spin Current Injection at Ferromagnet-Nonmagnet Interfaces by Molecular Design

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Authors	WITTMANN Angela SCHWEICHER Guillaume BROCH Katharina NOVÁK Jiří LAMI Vincent CORNIL David MCNELLIS Erik R. ZADVORNA Olga VENKATESHVARAN Deepak TAKIMIYA Kazuo GEERTS Yves H. CORNIL Jerome VAYNZOF Yana SINOVA Jairo WATANABE Shun SIRRINGHAUS Henning
Year of publication	2020
Type	Article in Periodical
Magazine / Source	Physical Review Letters
MU Faculty or unit	Faculty of Science
Citation
web	URL of the publication
Doi	http://dx.doi.org/10.1103/PhysRevLett.124.027204
Keywords	spintronics; organic semiconductors; Permalloy; spin injection; magnetic resonance
Description	There is a growing interest in utilizing the distinctive material properties of organic semiconductors for spintronic applications. Here, we explore the injection of pure spin current from Permalloy into a small molecule system based on dinaphtho[2,3-h:2,3-f]thieno[3,2-b]thiophene (DNTT) at ferromagnetic resonance. The unique tunability of organic materials by molecular design allows us to study the impact of interfacial properties on the spin injection efficiency systematically. We show that both the spin injection efficiency at the interface and the spin diffusion length can be tuned sensitively by the interfacial molecular structure and side chain substitution of the molecule.
Related projects:	CEITEC Nano CEITEC 2020