Low temperature SHPM

Scanning Hall probe microscope (SHPM) is a combination of miniature Hall probes and scannning tunelling microscope (STM). Local magnetisation measurements of a sample are obtained during scanning the sample underneath the Hall sensor in a close proximity to the sample surface. It enables noninvasive mapping of magnetic properties of superconductors and mangetic materials with unrivalled sensitivity.

Research scientist: Zuzana Vargaeštoková (leader), Tomáš Samuely (UPJŠ), Jozef Kačmarík, Pavol Szabó

Basic characteristics: submicron semiconducting Hall sensors to detect magnetic field piezo-crystals for fine scanning STM tracking distance detection high magnetic field resolution space resolution <1um large scan range (30x30 um2) lowest operation temperature 1.6 K highest magnetic field 8 T
Applications: local magnetisation measurements at very low temperatures and high magnetic fields vortex distribution and pinning measurements in pnictides, cuprates and other superconductors local field measurements on magnetic nanoparticles research of bit patterned media, magnetic domains...