Magnetization Anisotropy in ErB12 Antiferromagnet with Dynamic Charge Stripes

The anisotropy of magnetization in the antiferromagnetic (AF) metal Er11B12 with a complex amplitude-modulated magnetic structure and electronic instability (dynamic charge stripes along (110) direction) has been dissected with high accuracy and precision. It is shown that the fine details of 3D magnetization, including the change in sign of M(H, phi, theta) anisotropy with an increase of the external magnetic field, are caused by two main factors -(i) the magnetic phase transitions in the complicated AF state and (ii) strong magnetic fluctuations near the radial AF (H-phi) and (T-phi) phase boundaries, which are a consequence of electronic in -homogeneities (stripes).