Neutron diffraction on HoB12

Abstract The neutron diffraction on HoB12 samples reveals to antiferromagnetic order with wave-vector q =( 2 3 1 3 1 3 ) and (0 2 3 2 3 ) . Within statistics no further peaks were detected at low angles and the magnetic ordering is commensurate with a threefold cell size. The diffuse scattering signal shows that in zero field a substantial amount of the moments remains disordered at lowest temperatures, the disorder is lifted by the application of magnetic field. With limited data set and large magnetic unit cell a full determination of the magnetic structure remains difficult.