Nature of the transition between a ferromagnetic metal and a spin-glass insulator in pyrochlore molybdates
- The metal-insulator transition has been investigated for pyrochlore molybdates R2Mo2O7 with nonmagnetic rare-earth ions R. The dynamical scaling analysis of ac susceptibility reveals that the geometrical frustration causes the atomic spin-glass state. The reentrant spin-glass phase exists below the ferromagnetic transition. The electronic specific heat is enhanced as compared to the band calculation result, perhaps due to the orbital fluctuation in the half-metallic ferromagnetic state. The large specific heat is rather reduced upon the transition, likely because the short-range antiferromagnetic fluctuation shrinks the Fermi surface.
| Author: | N. Hanasaki, K. Watanabe, T. Ohtsuka, István KézsmárkiORCiDGND, S. Iguchi, S. Miyasaka, Y. Tokura |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-442001 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/44200 |
| ISSN: | 0031-9007OPAC |
| ISSN: | 1079-7114OPAC |
| Parent Title (English): | Physical Review Letters |
| Publisher: | American Physical Society (APS) |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2007 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2018/11/29 |
| Volume: | 99 |
| Issue: | 8 |
| First Page: | 086401 |
| DOI: | https://doi.org/10.1103/physrevlett.99.086401 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
