Magnetic frustrations in the Shastry–Sutherland system ErB4

Abstract Magnetization and neutron diffraction measurements on single crystal ErB4 have revealed that ErB4 orders antiferromagnetically below T N = 15.4 K with an ordering vector k = [ 1 0 0 ] . The magnetic susceptibility is highly anisotropic, χ c ≫ χ a . Successive metamagnetic transitions occur with a plateau at the half saturation magnetization (1/2 MS) for both B a and B c. The magnetic phase diagram is presented and discussed in relation to the frustration of the Shastry–Sutherland lattice.