Incommensurate-Commensurate Magnetic Phase Transition in SmRu$_{2}$Al$_{10}$
| Autor: | Takai, S., Matsumura, T., Tanida, H., Sera, M. |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 92, 174427 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.92.174427 |
| Popis: | Magnetic properties of single crystalline SmRu$_{2}$Al$_{10}$ have been investigated by electrical resistivity, magnetic susceptibility, and specific heat. We have confirmed the successive magnetic phase transitions at $T_{\text{N}}=12.3$ K and $T_{\text{M}}=5.6$ K. Resonant x-ray diffraction has also been performed to study the magnetic structures. Below $T_{\text{N}}$, the Sm$^{3+}$ moments order in an incommensurate structure with $q_1=(0, 0.759, 0)$. The magnetic moments are oriented along the orthorhombic $b$ axis, which coincides with the magnetization easy axis in the paramagnetic phase. A very weak third harmonic peak is also observed at $q_3=(0, 0.278, 0)$. The transition at $T_{\text{M}}$ is a lock-in transition to the commensurate structure described by $q_1=(0, 0.75, 0)$. A well developed third harmonic peak is observed at $q_3=(0, 0.25, 0)$. From the discussion of the magnetic structure, we propose that the long-range RKKY interaction plays an important role, in addition to the strong nearest neighbor antiferromagnetic interaction. Comment: 11 pages, 12 figures, accepted in PRB |
| Databáze: | arXiv |
| Externí odkaz: |
|