Phase diagram and magnetic structures of the Co-bearing dugganites Pb3TeCo3A2O14 (A = V, P)

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Journal of Physics: Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/25/24/246004· OSTI ID:1082112

Silverstein, H. J. ^[1]; Sharma, A. Z. ^[1]; Stoller, A. J. ^[1]; Cruz-Kan, K. ^[1]; Flacau, Roxana ^[2]; Donaberger, R. L. ^[2]; Zhou, H. D. ^[3]; Manuel, P. ^[4]; Huq, Ashfia ^[5]; Kolesnikov, Alexander I ^[5]; Wiebe, Christopher ^[6]

---

1. University of Manitoda, Winnipeg, Canada
2. National Research Council of Canada
3. Department of Physics and Astronomy, University of Tennessee
4. ISIS Facility, Rutherford Appleton Laboratory
5. ORNL
6. University of Winnipeg

Exhibiting rich magnetic behaviour and potentially multiferroic properties, the dugganites, a Te^6+ containing subgroup of the langasite series, are an attractive family of compounds for future study. It was recently shown that Pb-bearing members of the dugganite series undergo distortions away from the P321 symmetry that is characteristic of the langasites. Here, we detail the consequences these distortions have on the magnetism exhibited by Pb3TeCo3V2O14 and Pb3TeCo3P2O14, solving the magnetic structures of both compounds with respect to a new supercell. Using neutron scattering and magnetic susceptibility measurements, we show that small applied magnetic fields can seriously perturb the delicate magnetic states in both of these systems. This is further demonstrated by presenting how doping P^5+ onto the nonmagnetic V^5+ site completely changes the magnetic structure from either of the end series members. Finally, it is shown using inelastic neutron scattering and magnetic susceptibility measurements that Pb3TeCo3V2O14 can be characterized using a model for isosceles trimers, which do not exist in the previously reported P321 subcell.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1082112
• Journal Information: Journal of Physics: Condensed Matter, Vol. 25, Issue 24; ISSN 0953--8984
• Country of Publication: United States
• Language: English