Imaging vortices in superconductors at low temperatures
Hussein Ali Mohammed, Sufian Mohammed Nayif, Mohammed Ali Awad
In order to investigate the vortex lattice melting transition in detail Bi2Sr2CaCu2O8+ δ Scanning Hall probe microscopy (SHPM), a novel scanned probe magnetic imaging method, has been developed for single crystals. Using an integrated scanning tunnelling microscope (STM) or atomic force microscope (AFM) tip, the topography of a material can be recorded in real-time, enabling correlation with magnetic images later on. The numerous advantages of SHPM over other methods include its almost complete non-invasiveness and its suitability across a wide range of temperatures and magnetic fields. (0.3-300 Kelvin(K) and 0-7 Tesla (T), respectively), and its capacity to offer magnetic induction's z-component in quantitative maps. Photographing vortices at low temperatures in type II superconductors is made possible by the method's strong signal-to-noise ratio and reasonably good spatial resolution (>100 nm). Making use of models that GaAs/AlGaAs diameters between “0.4 µm - 0.8 µm high-resolution scanning Semiconductor 2DEG Hall probe microscopy (SHPM) Two orthogonal forms of flux structure, named Josephson vortices and pancake vortices, respectively, are generated in the crossing lattices domain of these highly anisotropic superconductors under tilted magnetic fields, according to research using Hall probe devices. (JVs and PVs)”. We see clear evidence for the formation about vortex lattice structures from H=+2.5 Oersted (Oe) gradually disappear.
AIP conference proceedings•Jan 1, 2026•0 citations