[1] VACUUMSCHMELZE GmbH & Co KG, D-63450 Hanau, Germany
[2] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain
[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
[4] Univ Basque Country, Fac Quim, Dept Fis Mat, San Sebastian 20009, Spain
[5] Festo AG & Co KG, D-73724 Esslingen, Germany
[6] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
[7] Vienna Univ Technol, Inst Festkorperphys, A-1040 Vienna, Austria
[8] Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba