Synthesis, Structure, and Magnetic Properties of (Tb_1–<i>x</i>Mn_<i>y</i>)MnO_3−δ

Abstract

Two compounds (Tb_1–<i>x</i>Mn_<i>y</i>)­MnO_3−δ (W1, <i>x</i> = 0.089, <i>y</i> = 0.063; W2, <i>x</i> = 0.122, <i>y</i> = 0.102) have been synthesized by solid-state method and characterized using neutron diffraction and magnetic measurements. They crystallize in space group <i>Pnma</i> at room temperature and <i>Pna2</i>₁ at low temperature. W1 shows a sinusoidal antiferromagnetic order, and W2 shows both sinusoidal and canted commensurate antiferromagnetic orders. The magnetic moments of the commensurate antiferromagnetic order for W2 are antiferromagnetically coupled along the <i>a</i>- and <i>c</i>-axes, and ferromagnetically coupled along the <i>b-</i>axis in the <i>Pna</i>2₁ setting. Strong ferromagnetic response is induced by doping more Mn into the Tb site of (Tb_1–<i>x</i>Mn_<i>y</i>)­MnO<sub>3−δ.</sub