- Tytuł:
- Experimental Study of the Thermal Transport in $CsNiF_3 - An S = 1$ Quantum Chain
- Autorzy:
-
Tkáč, V.
Orendáčová, A.
Orendáč, M.
Legut, D.
Tibenská, K.
Feher, A.
Poirier, M.
Meisel, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1427127.pdf
- Data publikacji:
- 2012-05
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.30.Et
75.40.Cx
66.70.Lm
75.30.Ds - Opis:
- The heat transport in a single-crystal of $CsNiF_3$ has been performed in the temperature range from 2 K to 7 K in a zero magnetic field, B = 0, as well as in sufficiently large magnetic fields, B = 6 T and 9 T, inducing the ferromagnetic ground state along the hard c-axis. $CsNiF_3$ represents an S = 1 quasi-one-dimensional XY ferromagnet with the intra-chain exchange coupling $J//k_{B}$ ≈ 24 K, single-ion anisotropy $D/k_{B}$ ≈ 8 K, and ordering temperature $T_{N}$ = 2.7 K. Comparison of the phonon and magnon velocities suggests that phonons are the main heat carriers in this magnetic insulator. The thermal conductivity in B = 0 was analysed in the frame of a standard Debye model. The temperature dependence of the effective phonon mean free path was calculated from the experimental data, and the enhancement of the phonon mean free path in B ≠ 0 was obtained, indicating that magnons act as scattering centers for phonons.
- Źródło:
-
Acta Physica Polonica A; 2012, 121, 5-6; 1098-1101
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł