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Spin Wave Excitation, Detection, and Utilization in the Organic‐Based Magnet, V(TCNE) x (TCNE = Tetracyanoethylene)
Author(s) -
Liu Haoliang,
Malissa Hans,
Stolley Ryan M.,
Singh Jaspal,
Groesbeck Matthew,
Popli Henna,
Kavand Marzieh,
Chong Su Kong,
Deshpande Vikram V.,
Miller Joel S.,
Boehme Christoph,
Vardeny Z. Valy
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202002663
Subject(s) - spin wave , yttrium iron garnet , spin pumping , spintronics , magnon , condensed matter physics , spin (aerodynamics) , excitation , materials science , excited state , tetracyanoethylene , magnonics , spin hall effect , magnet , spin polarization , ferromagnetism , atomic physics , physics , electron , chemistry , organic chemistry , quantum mechanics , thermodynamics
Spin waves, quantized as magnons, have low energy loss and magnetic damping, which are critical for devices based on spin‐wave propagation needed for information processing devices. The organic‐based magnet [V(TCNE) x ; TCNE = tetracyanoethylene; x ≈ 2] has shown an extremely low magnetic damping comparable to, for example, yttrium iron garnet (YIG). The excitation, detection, and utilization of coherent and non‐coherent spin waves on various modes in V(TCNE) x is demonstrated and show that the angular momentum carried by microwave‐excited coherent spin waves in a V(TCNE) x film can be transferred into an adjacent Pt layer via spin pumping and detected using the inverse spin Hall effect. The spin pumping efficiency can be tuned by choosing different excited spin wave modes in the V(TCNE) x film. In addition, it is shown that non‐coherent spin waves in a V(TCNE) x film, excited thermally via the spin Seebeck effect, can also be used as spin pumping source that generates an electrical signal in Pt with a sign change in accordance with the magnetization switching of the V(TCNE) x . Combining coherent and non‐coherent spin wave detection, the spin pumping efficiency can be thermally controlled, and new insight is gained for the spintronic applications of spin wave modes in organic‐based magnets.