Preprint article · Journal article
Dimensional evolution of spin correlations in the magnetic pyrochlore Yb2Ti2O7
McMaster University1
University of Waterloo2
Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Indiana University-Purdue University Indianapolis6
University of Maryland, College Park7
Los Alamos National Laboratory8
The pyrochlore material Yb2Ti2O7 displays unexpected quasi-two-dimensional (2D) magnetic correlations within a cubic lattice environment at low temperatures, before entering an exotic disordered ground state below T=265 mK. We report neutron scattering measurements of the thermal evolution of the 2D spin correlations in space and time.
Short-range three-dimensional (3D) spin correlations develop below 400 mK, accompanied by a suppression in the quasielastic (QE) scattering below ∼0.2 meV. These show a slowly fluctuating ground state with spins correlated over short distances within a kagome-triangular-kagome (KTK) stack along [111], which evolves to isolated kagome spin stars at higher temperatures.
Furthermore, low-temperature specific heat results indicate a sample dependence to the putative transition temperature that is bounded by 265 mK, which we discuss in the context of recent mean field theoretical analysis. ©2011 American Physical Society
| Language: | English |
|---|---|
| Year: | 2011 |
| Pages: | 5 |
| ISSN: | 1550235x , 10980121 , 24699950 and 01631829 |
| Types: | Preprint article and Journal article |
| DOI: | 10.1103/PhysRevB.84.174442 |
