The quantum spin ice model applied to Tb2Ti2O7 predicts that magnetic fields applied along the [111] axis will induce a partial magnetization plateau [H. R. Molavian and M. J. P. Gingras, J. Phys.: Condens. Matter 21, 172201 (2009)]. We test this hypothesis using ac magnetic susceptibility and muon-spin relaxation measurements, finding features at 15 and 65 mT agreeing with the predicted boundaries of the magnetization plateau. This suggests that Tb2Ti2O7 is well described by a quantum spin ice model with an effective exchange constant of Jeff = 0.17(1) K.
@article{arxiv.1105.2196,
title = {Partial magnetization plateau emerging from a quantum spin ice state in Tb2Ti2O7},
author = {P. J. Baker and M. J. Matthews and S. R. Giblin and P. Schiffer and C. Baines and D. Prabhakaran},
journal= {arXiv preprint arXiv:1105.2196},
year = {2011}
}