Neutron diffraction study of YVO 3 , NdVO 3 , and TbVO 3
作者： B. Keimer , M. Reehuis , C. Ulrich , M. C. Rheinstädter , M. Ohl
DOI: 10.1103/PHYSREVB.73.094440
关键词:
摘要: The structural and magnetic properties of YVO3, NdVO3 TbVO3 were investigated by single-crystal powder neutron diffraction. YVO3 shows a phase transition at 200 K from an orthorhombic structure with the space group Pbnm to monoclinic one P21 /b. But supplementary highresolution synchrotron diffraction experiments showed that distortion is extremely small. A theoretical analysis this state in incompatible lattice structure, unless terms higher than bilinear order spin operators are incorporated Hamiltonian. This observation discussed light recent theories invoking unusual many-body correlations between vanadium t2g orbitals. back observed upon cooling below 77 K. accompanied rearrangement into mode compatible structure. crystal structures closely similar YVO3. However, only single was found sublattice down 9.5 Below 60 moments Nd 3+ - Tb -ions gradually polarized ordered moments. 11 K, we noncollinear terbium
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