Isotropic transmission of magnon spin information without a magnetic field

Haldar, Arabinda and Tian, Chang and Adeyeye, Adekunle Olusola (2017) Isotropic transmission of magnon spin information without a magnetic field. Science Advances, 3 (7). e1700638. ISSN 2375-2548

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Spin-wave devices (SWD), which use collective excitations of electronic spins as a carrier of information, are rapidly emerging as potential candidates for post-semiconductor non-charge-based technology. Isotropic in-plane propagating coherent spin waves (magnons), which require magnetization to be out of plane, is desirable in an SWD. However, because of lack of availability of low-damping perpendicular magnetic material, a usually well-known in-plane ferrimagnet yttrium iron garnet (YIG) is used with a large out-of-plane bias magnetic field, which tends to hinder the benefits of isotropic spin waves. We experimentally demonstrate an SWD that eliminates the requirement of external magnetic field to obtain perpendicular magnetization in an otherwise in-plane ferromagnet, Ni80Fe20 or permalloy (Py), a typical choice for spin-wave microconduits. Perpendicular anisotropy in Py, as established by magnetic hysteresis measurements, was induced by the exchange-coupled Co/Pd multilayer. Isotropic propagation of magnon spin information has been experimentally shown in microconduits with three channels patterned at arbitrary angles.

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IITH Creators:
IITH CreatorsORCiD
Haldar, ArabindaUNSPECIFIED
Item Type: Article
Subjects: Physics > Magnetism
Physics > Modern physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 13 Oct 2017 05:58
Last Modified: 13 Oct 2017 05:58
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