| Zugriffsnummer | 14693 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Direct coupling of magnetic fields to tunneling systems in glasses |
| Autor(in); Institution |
Ludwig, S.; Universität Heidelberg, Kirchhoff-Institut für Physik, Heidelberg, GERMANY
Enss, C.; Universität Heidelberg, Kirchhoff-Institut für Physik, Heidelberg, GERMANY
Strehlow, Peter; 7.32, Tieftemperaturmetrologie, PTB-Berlin
Hunklinger, S.; Universität Heidelberg, Kirchhoff-Institut für Physik, Heidelberg, GERMANY
|
| Quelle/Jahr | Physical Review Letters: 88 (2002), 7, 075501-1 - 075501-4 |
| ISSN | 0031-9007 |
| DOI | |
| Verlag | Ridge, NY: American Physical Society |
| Klassifikationscode | PACS: 61.43.Fs ; PACS: 64.90.+b ; PACS: 77.22.Ch |
| Zusammenfassung | We report on investigations of spontaneous polarization echoes in the non-magnetic multivomponent glass BaO-Al2O3-SiO2 in static magnetic fields. While the echo decay is only marginally influenced, the echo amplitude depends strongly on magnetic fields. Our findings indicate that not only a small subset but virtually all tunneling systems couple directly to magnetic fields. It seems that the intrinsic magnetic moment of tunneling systems causes dephasing effects which are detected in our echo experiments. In addition we find a strong increase of the echo amplitude with magnetic fields. Our results indicate that the coupling of the tunneling systems to magnetic fields is surprisingly strong and dannot be understood on the basis of current theories. |
