Spin and orbital ordering in Y(1-x)La(x)VO(3)

TitleSpin and orbital ordering in Y(1-x)La(x)VO(3)
Publication TypeJournal Article
Year of Publication2011
AuthorsYan JQ, Zhou JS, Cheng JG, Goodenough JB, Ren Y, Llobet A, McQueeney RJ
Journal TitlePhysical Review B
Date Published12
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000297761200005

The spin and orbital ordering in Y(1-x)La(x)VO(3) (0.30 <= x <= 1.0) has been studied to map out the phase diagram over the whole doping range 0 <= x <= 1. The phase diagram is compared with that for RVO(3) (R = rare earth or Y) perovskites without A-site variance. For x > 0.20, no long-range orbital ordering was observed above the magnetic ordering temperature T(N); the magnetic order is accompanied by a lattice anomaly at a T(t) <= T(N) as in LaVO(3). The magnetic ordering below T(t) <= T(N) is G type in the compositional range 0.20 <= x <= 0.40 and C type in the range 0.738 <= x <= 1.0. Magnetization and neutron powder diffraction measurements point to the coexistence below T(N) of the two magnetic phases in the compositional range 0.4 < x < 0.738. Samples in the compositional range 0.20 < x <= 1.0 are characterized by an additional suppression of a glasslike thermal conductivity in the temperature interval T(N) < T < T* and a change in the slope of 1/chi(T). We argue that T* represents a temperature below which spin and orbital fluctuations couple together via lambda L center dot S.

Alternate JournalPhys. Rev. B