Electronic magnetic structure of intermetallic compounds RNi2Mn studied by XMCD

Abstract The x-ray absorption near edge structure (XANES) and the x-ray magnetic circular dichroism (XMCD) measurements in the hard X-ray range at the Ni and Mn K edges and Tb, Dy L 2, 3 edges were carried out in TbNi 2 Mn and DyNi 2 Mn in magnetic field up to 6 T at 10 K. XMCD on the Dy and Tb L -edges reaches 3.2%. The spin and orbital d- projected density of states on Tb and Dy atoms were obtained from the XMCD spectra. The Ni and Mn K-edges absorptions are practically identical in both compounds, as well as the dichroism spectra. The magnitude of dichroism is less than 0.5% and its length of about 50 eV. Scattering of outgoing p-wave on magnetic atoms environment is the main source of the K-edge dichroism. Element-specific magnetic hysteresis-loops measurements on TbNi 2 Mn and DyNi 2 Mn were performed by X-ray magnetic circular dichroism.