IFF Scientists on leave 1998
| Dr.W. Caliebe | HASYLAB at DESY, Hamburg, Germany |
| Prof. P. Grünberg | Tohoku University Sendai, Japan |
| Dr. J. Harris | MSI Inc. (formerly Biosym Technologies Inc), San Diego, USA |
| Dr. L. Heller | ESRF Grenoble, France |
| Dr. R. Lässer | Forschungszentrum Karlsruhe, Germany |
| Dr. A. Liebsch | Universidad Technica Guernavaca, Valparasio, Chile |
| Dr. W. Schmidt | ILL Grenoble, France |
| Dr. A. Scholl | Lawrence Berkeley Laboratory, USA |