A neutron diffraction and magnetization study of Heusler alloys containing Co and Zr, Hf, V or Nb Microsoft Academic Search Neutron diffraction, x-ray diffraction, and saturation magnetization ; measurements have been made on a series of ferromagnetic alloys at the ; composition Co???YZ, where Y is a group IVA or VA element and Z is a group ; IIIB or IVB element.