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Incommensurate-Commensurate Magnetic Phase Transition in SmRu$ {2}$Al$ {10}$ by Takai, S.; Matsumura, T.; Tanida, H.; Sera, M. is a scholarly article available to read on EtoBox.

What is Incommensurate-Commensurate Magnetic Phase Transition in SmRu$ {2}$Al$ {10}$ about?

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.

Author

Takai, S.; Matsumura, T.; Tanida, H.; Sera, M.

Published

2015

Language

EN