28 research outputs found

    Atomic displacements and lattice distortion in the magnetic-field-induced charge ordered state of SmRu4_{4}P12_{12}

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    Structural properties of SmRu4_4P12_{12} in the anomalous magnetic ordered phase between T∗∼14T^*\sim 14 K and TN=16.5T_{\text{N}}=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 pp electrons, have been deduced by analyzing the intensities of the forbidden Bragg peaks, assuming a cubic space group Pm3ˉPm\bar{3}. Also, by utilizing 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][1\, 1\, 1] axis. Responses of the rhombohedral domains to the magnetic field, which reflects the direction of the magnetic moment, is studied in detail.Comment: 11 pages, 11 figures, accepted for publication in PR
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