N. Toyota: graduated in 1977 from Tohoku University
1977-1985 research associate, Institute for Materials Research, Tohoku Univ., Japan
1985-1994 associate professor, Institute for Materials Research, Tohoku Univ., Japan
1994-1998 professor, Research Institute for Advanced Science and Technology, Osaka Prefecture Univ., Japan
1998- professor, Physics Department, Graduate School of Science, Tohoku Univ., Japan
M. Lang: graduated in 1991 from the Technical University Darmstadt, Germany;
1991-1992 Research associate at the Institute for Materials Research, Tohoku University, Sendai, Japan;
1992-1996 Research Associate and Habilitation at the Technical University Darmstadt, Germany;
1996-2000 Head of the low-temperature group at the Max-Planck Institute for Chemical Physics of Solids in Dresden, Germany;
2000- University professor at the Physics Institute at the J.W. Goethe-University, Frankfurt(M),
