Spintronic detection of interfacial magnetic switching in a paramagnetic thin film of tris(8-hydroxyquinoline)iron(III)

Dali Sun, Christopher M. Kareis, Kipp J. Van Schooten, Wei Jiang, Gene Siegel, Marzieh Kavand, Royce A. Davidson, William W. Shum, Chuang Zhang, Haoliang Liu, Ashutosh Tiwari, Christoph Boehme, Feng Liu, Peter W. Stephens, Joel S. Miller, Z. Valy Vardeny

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Organic semiconductors find increasing importance in spin transport devices due to the modulation and control of their properties through chemical synthetic versatility. The organic materials have been used as interlayers between two ferromagnet (FM) electrodes in organic spin valves, as well as for magnetic spin manipulation of metal-organic complexes at the molecular level. In the latter, the substrate-induced magnetic switching in a paramagnetic molecule has been evoked extensively but studied by delicate surface spectroscopies. Here we present evidence of the substantial magnetic switching in a thin film of the paramagnetic molecule, tris(8-hydroxyquinoline)iron(III) (Feq3) deposited on a FM substrate, using the magnetoresistance response of electrical spin-injection in an organic spin valve structure, as well as the inverse-spin-Hall effect induced by state-of-art pulsed microwave spin-pumping. We show that interfacial spin control at the molecular level may lead to a macroscopic organic spin transport device, thus bridging the gap between organic spintronics and molecular spintronics.

Original languageEnglish (US)
Article number054423
JournalPhysical Review B
Volume95
Issue number5
DOIs
StatePublished - Feb 17 2017
Externally publishedYes

Bibliographical note

Funding Information:
This paper was supported by the National Science Foundation-Material Science & Engineering Center (NSF-MRSEC; DMR-1121252). The ISHE measurements were supported by the National Science Foundation (DMR-1404634). Use of the National Synchrotron Light Source, Brookhaven National Laboratory was supported by the Basic Energy Sciences, Department of Energy (DE-AC02-98CH10886).

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