2025/10/22 by Somesh, K., Thebault, T., Taufour, V. +5
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2510.19404
We present electrical-resistivity measurements on the prototypical heavy-fermion ferromagnet UGe2 under pulsed magnetic field up to 60~T. An anisotropic field-induced suppression of the electronic correlations is revealed. The electrical resistivity strongly decreases when a magnetic field H is applied along the easy magnetic axis a, while it remains almost unchanged when H is applied along the hard magnetic axes b and c. The field-induced destabilization of the ferromagnetic state is also anisotropic: the anomaly at the Curie temperature TC disappears in fields higher than \gtrsim1~T for H\parallela and in fields higher than \gtrsim20~T for H\parallelb,c. At temperatures below 2~K, we observe quantum oscillations in fields larger than 50~T applied along b, which support the presence of a two-dimensional Fermi surface similar to that previously observed at low fields.