Superresolution magnetic imaging by a Josephson junction via holographic reconstruction of I c ( H ) modulation

Golod, Taras, 1981- (författare): Stockholms universitet,Fysikum,Institutionen för material- och miljökemi (MMK)

Krasnov, Vladimir M., Prof. Dr. 1967- (författare): Stockholms universitet,Fysikum

(creator_code:org_t)

Relaterad länk:: https://doi.org/10.1...; visa fler...; https://urn.kb.se/re...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

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This work provides a proof -of -concept for superresolution magnetic imaging using a single Josephson junction. The technique resembles digital holography: magnetic patterns are obtained via an inverseproblem solution from diffractionlike modulation of the junction's critical current, I c (H) . We demonstrate numerical reconstruction of complex two-dimensional patterns, verify the technique experimentally using Nb-based planar junctions, and fabricate an operational sensor on a cantilever. Our results show that Josephson holography allows for both high spatial resolution (approximately 20 nm) and high field sensitivity (approximately 10 - 11 T R root Hz), thus resolving the trade-off problem between resolution and sensitivity in magnetic scanning probe imaging.

Av författaren/redakt...: Hovhannisyan, Ra ...; Golod, Taras, 19 ...; Krasnov, Vladimi ...

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