We report measurements of the de Haas-van Alphen effect in CeIn3 in magnetic fields extending to ~90 T, well above the Ne'el critical field of Hc ~61 T. The unreconstructed Fermi surface a-sheet is observed in the high magnetic field polarized paramagnetic limit, but with its effective mass and Fermi surface volume strongly reduced in size compared to that observed in the low magnetic field paramagnetic regime under pressure. The spheroidal topology of this sheet provides an ideal realization of the transformation from a `large Fermi surface' accommodating f-electrons to a `small Fermi surface' when the f-electron moments become polarized.
@article{arxiv.0706.2387,
title = {Fermi surface of CeIn3 above the Neel critical field},
author = {N. Harrison and S. E. Sebastian and C. H. Mielke and A. Paris and M. J. Gordon and C. A. Swenson and D. G. Rickel and M. D. Pacheco and P. F. Ruminer and J. B. Schillig and J. R. Sims and A. H. Lacerda and M. T. Suzuki and H. Harima and T. Ebihara},
journal= {arXiv preprint arXiv:0706.2387},
year = {2009}
}