Suppressed-moment 2-k order in the canonical frustrated antiferromagnet Gd2Ti2O7
Abstrak
Abstract In partially ordered magnets, order and disorder coexist in the same magnetic phase, distinct from both spin liquids and spin solids. Here, we determine the nature of partial magnetic ordering in the canonical frustrated antiferromagnet Gd2Ti2O7, in which Gd3+ spins occupy a pyrochlore lattice. Using single-crystal neutron-diffraction measurements in applied magnetic field, magnetic symmetry analysis, inelastic neutron-scattering measurements, and spin-wave modeling, we show that its low-temperature magnetic structure involves two propagation vectors (2-k structure) with suppressed ordered magnetic moments and enhanced spin-wave fluctuations. Our experimental results are consistent with theoretical predictions of thermal fluctuation-driven order in Gd2Ti2O7, and reveal that inelastic neutron-scattering measurements on powder samples can solve the longstanding problem of distinguishing single-k and multi-k magnetic structures.
Topik & Kata Kunci
Penulis (12)
Joseph A. M. Paddison
Georg Ehlers
Andrew B. Cairns
Jason S. Gardner
Oleg A. Petrenko
Nicholas P. Butch
Dmitry D. Khalyavin
Pascal Manuel
Henry E. Fischer
Haidong Zhou
Andrew L. Goodwin
J. Ross Stewart
Akses Cepat
- Tahun Terbit
- 2021
- Sumber Database
- DOAJ
- DOI
- 10.1038/s41535-021-00391-w
- Akses
- Open Access ✓