  Precise angle-resolved magnetoresistance and magnetization measurements have
revealed (i) strong charge transport and magnetic anisotropy and (ii) emergence
of a huge number of magnetic phases in the ground state of TmB12
antiferromagnetic metal with fcc crystal structure and dynamic charge stripes.
By analyzing the angular H-fi magnetic phase diagrams reconstructed from
experimental angle-resolved magnetoresistance and magnetization data we argue
that the symmetry lowering is a consequence of suppression of the indirect
Ruderman- Kittel-Kasuya-Yosida (RKKY) exchange along 110 directions between
nearest neighboring magnetic moments of Tm3+ ions and subsequent redistribution
of conduction electrons to quantum fluctuations of the electron density
(stripes). Magnetoresistance components are discussed in terms of charge
scattering on the spin density wave, itinerant ferromagnetic nano-domains and
on-site Tm3+ spin fluctuations.
