Spin and orbital ordering in Y_1-xLa_xVO₃

Journal Article · Fri Dec 02 00:00:00 EST 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.84.214405· OSTI ID:1098338

Yan, J.-Q.; Zhou, J.-S.; Cheng, J. G.; Goodenough, J. B.; Ren, Y.; Llobet, A.; McQueeney, R. J.

The spin and orbital ordering in Y_1-xLa_xVO₃ (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 RVO₃ (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 Tt ≤ T_N as in LaVO₃. The magnetic ordering below Tt ≤ 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/χ(T). We argue that T* represents a temperature below which spin and orbital fluctuations couple together via λL∙S.

• Sponsoring Organization: USDOE
• OSTI ID: 1098338
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Vol. 84 Journal Issue: 21; ISSN 1098-0121
• Publisher: American Physical Society
• Country of Publication: United States
• Language: English