SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging
Y. Anahory, H. R. Naren, E. O. Lachman, S. Buhbut Sinai, A. Uri, L. Embon, E. Yaakobi, Y. Myasoedov, M. E. Huber, R. Klajn, E. Zeldov
Abstract
A SQUID-on-tip device with a record size (39 nm), sensitivity (0.29 μ<sub>B</sub> Hz<sup>−1/2</sup>), and operating temperature (300 mK) is reported, making it possible to image the stray magnetic field of Fe<sub>3</sub>O<sub>4</sub> nanocubes on a single-nanoparticle level.
Topics & Concepts
Materials scienceResistive touchscreenMagnetizationNanoscopic scaleSuperconductivityMagnetic fieldDemagnetizing fieldOptoelectronicsCondensed matter physicsScanning electron microscopeMagnetoresistanceNoise (video)MicroscopyMagnetic fluxScanning probe microscopyOpticsMicroscopeMagnetic force microscopeQuantum dotMagnetometerSpin (aerodynamics)Phase transitionThin filmNanotechnologyFerromagnetismDopingSpin valveDeposition (geology)Sensitivity (control systems)NanowireTransition temperatureGiant magnetoresistanceHigh-temperature superconductivityScanning SQUID microscopyAtomic and Subatomic Physics ResearchMagnetic properties of thin filmsQuantum and electron transport phenomena