Exploring a quantum-information-relevant magnonic material: Ultralow damping at low temperature in the organic ferrimagnet V[TCNE]x

Huma Yusuf; Michael Chilcote; Denis R Candido; Seth W Kurfman; Donley S Cormode; Yu Lu; Michael E Flatté; Ezekiel Johnston-Halperin

doi:10.1116/5.0044193

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Exploring a quantum-information-relevant magnonic material: Ultralow damping at low temperature in the organic ferrimagnet V[TCNE]x

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Exploring a quantum-information-relevant magnonic material: Ultralow damping at low temperature in the organic ferrimagnet V[TCNE]x

Huma Yusuf, Michael Chilcote, Denis R Candido, Seth W Kurfman, Donley S Cormode, Yu Lu, Michael E Flatté and Ezekiel Johnston-Halperin

AVS quantum science, Vol.3(2), p.26801

06/01/2021

DOI: 10.1116/5.0044193

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https://arxiv.org/pdf/2008.13061View

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Abstract

AVS Quantum Sci. 3, 026801 (2021) Quantum information science and engineering requires novel low-loss magnetic materials for magnon-based quantum-coherent operations. The search for low-loss magnetic materials, traditionally driven by applications in microwave electronics near room-temperature, has gained additional constraints from the need to operate at cryogenic temperatures for many applications in quantum information science and technology. Whereas yttrium iron garnet (YIG) has been the material of choice for decades, the emergence of molecule-based materials with robust magnetism and ultra-low damping has opened new avenues for exploration. Specifically, thin-films of vanadium tetracyanoethylene (V[TCNE]x) can be patterned into the multiple, connected structures needed for hybrid quantum elements and have shown room-temperature Gilbert damping ({\alpha} = 4 \times 10^-5) that rivals the intrinsic (bulk) damping otherwise seen only in highly-polished YIG spheres (far more challenging to integrate into arrays). Here, we present a comprehensive and systematic study of the low-temperature magnetization dynamics for V[TCNE]x thin films, with implications for their application in quantum systems. These studies reveal a temperature-driven, strain-dependent magnetic anisotropy that compensates the thin-film shape anisotropy, and the recovery of a magnetic resonance linewidth at 5 K that is comparable to room-temperature values (roughly 2 G at 9.4 GHz). We can account for these variations of the V[TCNE]x linewidth within the context of scattering from very dilute paramagnetic impurities, and anticipate additional linewidth narrowing as the temperature is further reduced.

Details

Title: Subtitle: Exploring a quantum-information-relevant magnonic material: Ultralow damping at low temperature in the organic ferrimagnet V[TCNE]x
Creators: Huma Yusuf - The Ohio State University
Michael Chilcote - The Ohio State University
Denis R Candido - University of Iowa
Seth W Kurfman - The Ohio State University
Donley S Cormode - The Ohio State University
Yu Lu - The Ohio State University
Michael E Flatté - University of Iowa
Ezekiel Johnston-Halperin - The Ohio State University
Resource Type: Journal article
Publication Details: AVS quantum science, Vol.3(2), p.26801
DOI: 10.1116/5.0044193
ISSN: 2639-0213
eISSN: 2639-0213
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy, award: DE-SC0019250; DOI: 10.13039/100000001, name: National Science Foundation, award: EFMA-1741666; DOI: 10.13039/100000001, name: National Science Foundation, award: DMR- 1741666
Language: English
Date published: 06/01/2021
Academic Unit: Electrical and Computer Engineering; Physics and Astronomy
Record Identifier: 9984386732502771

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