Magnetic structure of La1.2Tb0.8CuO4
作者： Alexandros Lappas , Kosmas Prassides
DOI: 10.1039/FT9969202151
关键词: Neutron diffraction 、 Paramagnetism 、 Tetragonal crystal system 、 Condensed matter physics 、 Ion 、 Electron magnetic dipole moment 、 Spin-½ 、 Perpendicular 、 Chemistry 、 Magnetic structure
摘要: A high-intensity powder neutron diffraction study of La1.2Tb0.8CuO4 which has the tetragonal T*-structure shows that compound orders antiferromagnetically with a magnetic structure can be described by employing propagation vector, τ=(–½, ½, 0) perpendicular to Cu2+ spin direction, S, =(½, 0)(identical La2CuO4). The staggered moment at 1.6 K is 0.46 (6)µB. However, non-collinear structures are also possible. appearance diffuse scattering low temperatures interpreted as signature short range ordering Tb3+ ions. Essentially unchanged behaviour found in lightly-doped La1.19Tb0.8Sr0.01CuO4 and La1.2Tb0.79Ce0.01CuO4 materials.
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