1. Institut
de Science des Matériaux de Mulhouse, CNRS-Université de Haute Alsace, ENSCMu, 68093 Mulhouse, France
2. Department
of Applied Physics, University of Eastern Finland, Yliopistonranta
1F, 70211 Kuopio, Finland
3. Bruker Biospin SA, 34, Rue de
l’Industrie, 67166 Wissembourg Cedex, France