Low temperature thermal conductivity of bilayer lanthanum-strontium-manganite (La1.2Sr1.8Mn2O7 [electronic resource]
Thermal conductivity measurements were performed on bilayer manganite La{sub 1.2}Sr{sub 1.8}Mn₂O₇ down to 0.1 K and up to 7.5 T. Due to the fact that ferromagnetic magnons can be largely gapped with a magnetic field, we could separate the magnon contribution to the thermal conductivity as well as th...
Saved in:
| Online Access: |
Online Access |
|---|---|
| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
2008.
|
| Subjects: |
| Summary: | Thermal conductivity measurements were performed on bilayer manganite La{sub 1.2}Sr{sub 1.8}Mn₂O₇ down to 0.1 K and up to 7.5 T. Due to the fact that ferromagnetic magnons can be largely gapped with a magnetic field, we could separate the magnon contribution to the thermal conductivity as well as the specific heat. Consequently, we find evidence for the transport of heat by 2-dimensional ferromagnetic magnons which are scattered by electrons. Assuming that the Wiedemann-Franz law is obeyed we find a self consistent analysis which shows a phonon thermal conductivity at low temperatures proportional to T{sup 1.7}. This is evidence that structurally glassy dynamics persist down to very low temperatures in the manganites. |
|---|---|
| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/2008. "la-ur-08-06559" " la-ur-08-6559" Phys. Rev. Ltrs. ISSN 0031-9007; PRLTAO FT. Hur, N; Ronning, Filip; Vekhter, I; Kurita, Nobuyuki; Mcclellan, Kenneth J; Movshovich, Roman. |