Multicritical end point of the first-order ferromagnetic transition in colossal magnetoresistive manganites
- We have studied the bandwidth–temperature–magnetic-field phase diagram of RE0.55Sr0.45MnO3 colossal magnetoresistance manganites with ferromagnetic metal (FM) ground state. The bandwidth was controlled both via chemical substitution and hydrostatic pressure with a focus on the vicinity of the critical pressure p∗ where the character of the zero-field FM transition changes from first to second order. Below p∗ the first-order FM transition extends up to a critical magnetic field. It approaches zero on the larger bandwidth side where the surface of the first-order FM phase boundary is terminated by a multicritical end point. The change in the character of the transition and the decrease of the colossal magnetoresistance effect is attributed to the reduced charge-order and orbital-order fluctuations.
| Author: | L. Demkó, István KézsmárkiORCiDGND, G. Mihály, N. Takeshita, Y. Tomioka, Y. Tokura |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-437337 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/43733 |
| 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: | 2008 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2018/11/19 |
| Volume: | 101 |
| Issue: | 3 |
| First Page: | 037206 |
| DOI: | https://doi.org/10.1103/physrevlett.101.037206 |
| 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 |
