Giant spin pumping at the ferromagnet (permalloy) – organic semiconductor (perylene diimide) interface

Manoj, Talluri and Kotha, Srinu and Paikaray, Bibekananda and Srideep, Dasari and Haldar, Arabinda and Kotagiri, Venkata Rao and Murapaka, Chandrasekhar (2021) Giant spin pumping at the ferromagnet (permalloy) – organic semiconductor (perylene diimide) interface. RSC Advances, 11 (56). pp. 35567-35574. ISSN 2046-2069

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Abstract

Pure spin current based devices have attracted great interest in recent days. Spin current injection into non-magnetic materials is essential for the design and development of such pure spin current based devices. In this context, organic semiconductors (OSCs) can be potential non-magnetic materials over widely explored heavy metals. This is due to the relatively low spin-orbit coupling of OSCs, which is essential to host the spin current with a large spin diffusion length and long spin-relaxation time. This research work demonstrates the harvesting of spin currents at the perylene diimide (PDI)/permalloy (Py) based OSC interface. The observed high linewidth broadening of 2.18 mT from the ferromagnetic resonance spectra indicates the presence of giant spin pumping from Py to PDI. The resultant spin-mixing conductance, 1.54 × 1018 m-2 quantifies the amount of spin current injected from Py to PDI, which is in a similar range to ferromagnet/heavy metals. © The Royal Society of Chemistry.

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IITH Creators:

IITH Creators	ORCiD
Haldar, Arabinda	https://orcid.org/0000-0002-0490-9719
Kotagiri, Venkata Rao	https://orcid.org/0000-0002-6821-6241
Murapaka, Chandrasekhar	https://orcid.org/0000-0002-0283-7037

Item Type:

Article

Additional Information:

CM would like to acknowledge funding from SERB-Early Career Research Award (ECR/2018/002664). KVR acknowledge SERB-Early Career Research Award (ECR/2018/001222), government of India for the nancial support. AH would like to acknowledge funding from Ramanujan Fellowship (SB/S2/RJN-118/2016), Department of science and Technology, India. TM and DS acknowledges the funding from Ministry of Education (MoE) for pursing PhD BP would like to acknowledge fellowship from the Department of science and Technology, India (DST/INSPIRE Fellowship/[IF180927]). SK thanks the CSIR, India for the junior research fellowship. Authors would like to thank Dr Shourya Dutta Gupta and Mr Jayakumar Pillangrovi for facilitating spin coating unit.

Uncontrolled Keywords:

Design and Development; Large spin; Non-magnetic materials; Permalloys; Perylene diimides; Perylenediimides; Spin current injection; Spin currents; Spin-orbit couplings; Spin-pumping

Subjects:

Physics
Chemistry
Materials Engineering > Materials engineering

Divisions:

Department of Chemistry
Department of Material Science Engineering
Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

24 Aug 2022 11:53

Last Modified:

24 Aug 2022 11:53

URI:

http://raiithold.iith.ac.in/id/eprint/10288