Three-dimensional $(H{-}\varphi{-}\theta)$ phase diagram of $\mathrm{Er}\mathrm{B}_{12}$ antiferromagnet with dynamic charge stripes

A three-dimensional ($H,\varphi,\theta$, ${T=2\,}$K) magnetic phase diagram has been constructed for the first time for the antiferromagnetic metal $\mathrm{Er}^{11}\mathrm{B}_{12}$ with an amplitude-modulated magnetic structure exhibiting an electronic instability (dynamic charge stripes). The boundaries determining the shape of the main magnetic phases in the $(H{-}\varphi{-}\theta)$ space are reconstructed from measurements of the magnetoresistance. The role of dynamic charge stripes, which suppress the indirect Ruderman–Kittel–Kasuya–Yoshida exchange between the magnetic moments of the nearest $\mathrm{Er}^{3+}$ ions, and of the single-ion anisotropy in the formation of a complicated multicomponent phase diagram of $\mathrm{Er}^{11}\mathrm{B}_{12}$ is discussed.