Mat'as, S.; Siemensmeyer, K.; Wheeler, E.; Wulf, E.; Beyer, R.; Hermannsdörfer, Th.; Ignatchik, O.; Uhlarz, M.; Flachbart, K.; Gabani, S.; Priputen, P.; Efdokimova, A.; Shitsevalova, N: Magnetism of rare earth tetraborides. Journal of Physics: Conference Series 200 (2010), p. 0320041/1-4
10.1088/1742-6596/200/3/032041
Abstract:
The rare earth tetraborides REB4 with RE = Ho, Er, Tm, crystallize in a tetragonal lattice where the positions of the RE ions can be mapped to a Shastry Sutherland lattice. We have investigated the magnetic properties by means of magnetisation and specific heat experiments in a magnetic field. All compounds are anisotropic, with RE= Er, Tm they are strong Ising magnets, for RE = Ho we find xy anisotropy. In magnetic field we find complex behaviour with a number of different phases as a function of applied field, field direction and temperature. Remarkable is the observation of fractional magnetisation plateaux for magnetic field || (001) in HoB4 and TmB4.