[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada
[2] Univ Sherbrooke, RQMP, Sherbrooke, PQ J1K 2R1, Canada
[3] CNRS, Lab Natl Champs Magnet Intenses, F-31432 Toulouse, France
[4] Canadian Inst Adv Res, Toronto, ON, Canada
[5] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada
[6] Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan
[7] CNRS, Lab Natl Champs Magnet Intenses, F-38042 Grenoble, France
[8] UPMC, ESPCI, CNRS, LPEM, F-75231 Paris, France