Atomic displacements and lattice distortion in the magnetic-field-induced charge-ordered state of SmRu4P12
PhysRevB_94-18_184425.pdf 1.32 MB
Matsuda, Tatsuma D
Structural properties of SmRu4P12 in the anomalous magnetic ordered phase between T* ~ 14 K and TN = 16.5 K in magnetic fields has been studied by x-ray diffraction. Atomic displacements of Ru and P, reflecting the field-induced charge order of the p electrons, have been deduced by analyzing the intensities of the forbidden Bragg peaks, assuming a cubic space groupPm¯3. Also, by utilizing a high-resolution x-ray diffraction experiment, we observed a splitting of fundamental Bragg peaks, clarifying that the unit cell in the magnetic ordered phase is rhombohedral elongated along the [1 1 1] axis. The response of the rhombohedral domains to the magnetic field, which reflects the direction of the magnetic moment, is studied in detail.
This work was supported by JSPS KAKENHI Grants No. 24340087 and No. 15K05175.
Physical Review B
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American Physical Society
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Graduate School of Advanced Sciences of Matter
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