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

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Authors

WITTMANN A. SCHWEICHER G. BROCH K. NOVÁK Jiří LAMI V. CORNIL D. MCNELLIS E.R. ZADVORNA O. VENKATESHVARAN D. TAKIMIYA K. GEERTS Y.H. CORNIL J. VAYNZOF Y. SINOVA J. WATANABE S. SIRRINGHAUS H.

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.
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