Magnetic Properties and Neutron Diffraction Measurements of Dense-Kondo Compound CeNi_<b>2</b>Al_<b>5</b>

Abstract

The intermetallic compound CeNi 2 Al 5 is an orthorhombic dense-Kondo compound with a magnetic transition temperature at 2.6 K. We have carried out magnetization and neutron diffraction measurements to study the magnetic structure of CeNi 2 Al 5 using a powder sample and a single crystalline sample. It is found that the magnetic structure is sine-wave modulated with a propagation vector k =(1/2,2/5,1/12). The maximum amplitude of magnetic moment is equal to 1.54 µ B and its direction is tilted 8 degrees from the b -axis toward the a -axis.