期刊
PHYSICAL REVIEW B
卷 86, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.214419
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资金
- NSF [DMR-1104122]
- Royal Society (UK)
- ANPCyT (Argentina)
- CONICET (Argentina)
- EPSRC [EP/G049394/1, EP/H033939/1]
- Helmholtz Virtual Institute New states of matter and their excitations
- EPSRC [EP/G049394/2, EP/G049394/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G049394/2, EP/G049394/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1341793] Funding Source: National Science Foundation
We have studied the field-dependent ac magnetic susceptibility of single crystals of Dy2Ti2O7 spin ice along the [111] direction in the temperature range 1.8-7 K. Our data reflect the onset of local spin-ice order in the appearance of different field regimes. In particular, we observe a prominent feature at approximately 1.0 T that is a precursor of the low-temperature metamagnetic transition out of field-induced kagome ice, below which the kinetic constraints imposed by the ice rules manifest themselves in a substantial frequency dependence of the susceptibility. Despite the relatively high temperatures, our results are consistent with a monopole picture, and they demonstrate that such a picture can give physical insight into spin-ice systems even outside the low-temperature, low-density limit where monopole excitations are well-defined quasiparticles.
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