Construction of a ${}^3$He magnetic force microscope with a vector magnet

Abstract

We constructed a ${}^3$He magnetic force microscope operating at the base temperature of 300 mK under a vector magnetic field of 2-2-9 T in the $x-y-z$ direction. Fiber optic interferometry as a detection scheme is employed in which two home-built fiber walkers are used for the alignment between the cantilever and the optical fiber. The noise level of the laser interferometer is close to its thermodynamic limit. The capabilities of the sub-Kelvin and vector field are demonstrated by imaging the coexistence of magnetism and superconductivity in a ferromagnetic superconductor (ErNi${}_2$B${}_2$C) at $T$=500 mK and by probing a dipole shape of a single Abrikosov vortex with an in-plane tip magnetization.

References in corpus (6)

• Quantum magnetism and criticality
• Visualizing heavy fermions emerging in a quantum critical Kondo lattice
• Imaging Cooper Pairing of Heavy Fermions in CeCoIn5
• Controlled Manipulation of Individual Vortices in a Superconductor
• Magnetic domain tuning and the emergence of bubble domains in the bilayer manganite La${}_{2-2x}$Sr${}_{1+2x}$Mn${}_2$O${}_7$ (x=0.32)
• Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ErNi2B2C

Cited by in corpus (1)

• Domain engineering of the metastable domains in the 4f-uniaxial-ferromagnet CeRu${}_2$Ga${}_2$B