  Strongly correlated Kagome magnets are promising candidates for achieving
controllable topological devices owing to the rich interplay between inherent
Dirac fermions and correlation-driven magnetism. Here we report tunable local
magnetism and its intriguing control of topological electronic response near
room temperature in the Kagome magnet Fe3Sn2 using small angle neutron
scattering, muon spin rotation, and magnetoresistivity measurement techniques.
The average bulk spin direction and magnetic domain texture can be tuned
effectively by small magnetic fields. Magnetoresistivity, in response, exhibits
a measurable degree of anisotropic weak localization behavior, which allows the
direct control of Dirac fermions with strong electron correlations. Our work
points to a novel platform for manipulating emergent phenomena in
strongly-correlated topological materials relevant to future applications.

Materials Science;Strongly Correlated Electrons