Powder Neutron Diffraction Study of TbCoGa^sub 5

We report powder neutron diffraction study on TbCoGa ... in order to understand the successive components-separated magnetic transitions. TbCoGa ... exhibits a collinear antiferromagnetic order with the propagation vector k ... =(1/2, 0, 1/2) in the intermediate phase II. The magnetic moments are parallel to the c direction. In phase III, the a - or b -component of the magnetic moment is ordered, in addition to the c -component order in phase II, resulting in the formation of an antiferromagnetic order canted from the c -direction. The results of the present study strongly indicate that, in phase II, the c -component of the magnetic moment is ordered but the a - or b -component of the magnetic moment is non-ordered state. (ProQuest: ... denotes formulae/symbols omitted.)