Effects of cation-size variance on spin and orbital orders in Eu1−x(La0.254Y

Lattice distortion in the spin-orbital entangled state in RVO3 perovskites

“…Y 0.7 La 0.3 VO 3 and EuVO 3 have similar average ionic radius of the rare earth site. EuVO 3 has a G-OO/C-AF ground state with T OO =204 K and T N =131 K. 27,50 The occurrence of spin-orbital entanglement and the C-OO/G-AF ground state of Y 0.7 La 0.3 VO 3 highlight the importance of the size variance of the rare earth site: rare earth site disorder favors the spin-orbital entanglement by impeding the cooperative Jahn-Teller distortion. This is supported by the observation of the spin-orbital entanglement in a wide composition range 0.2<x<1 in Y 1−x La x VO 3 .…”

“…The comparative study between Y 1−x La x VO 3 and RVO 3 sug- gests two different routes, as shown in Fig. 27 . While the evolution with temperature of the nuclear structure in the former route has been extensively studied, 4,28-33 a detailed investigation of the lattice response in the latter route is still absent.…”

“…While the evolution with temperature of the nuclear structure in the former route has been extensively studied, 4,28-33 a detailed investigation of the lattice response in the latter route is still absent. 26,27 In this paper, we present a thorough study of Y 0.7 La 0.3 VO 3 single crystals by a variety of techniques including magnetic measurements, specific heat, thermal conductivity, x-ray and neutron diffraction. Compared to the pseudocubic LaVO 3 with three nearly identical V-O bonds, Y 0.7 La 0.3 VO 3 has a larger GdFeO 3 distortion and has, at room temperature, one long, one medium, and one short V-O bond that could be well resolved with neutron powder diffraction measurements.…”

Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy1−xTbxVOYan1, Cao2, McGuire3 et al. 2013Phys. Rev. B7030View full textAdd to dashboardCite

“…The effect of size variance on the spin and orbital ordering in RVO 3 perovskites has been studied in Y 1−x La x VO 3 , [18,19] [12] and Eu 1−x (La 0.254 Y 0.746 ) x VO 3 . [22] Despite a different understanding of how quenched disorder affects the spin and orbital ordering, both Yan et al [18,19] and Fukuta et al [22] observed that the rare earth size variance suppresses T OO and T N but enhances T CG . By contrast, the study of Y 1−x Eu x VO 3 by Fujioka et al [12] showed that G-OO/C-AF phase is stabilized and C-OO/G-AF phase is destabilized with increasing x.…”

Resonant X-ray Scattering Experiments on the Ordering of Electronic Degrees of Freedom

“…The orbital superlattice structure of a manganite was detected as well as those of bulk samples. 17) Orbital and charge orderings in titanates [25][26][27][28][29] and vanadates [30][31][32][33][34][35][36] of the t 2g electron system have also been studied using K-edge energy. Moreover, orbital and charge orderings in Fe, [37][38][39][40][41][42] Co, 43,44) and Ni 45) systems have been investigated.…”