Unique magnetic structure of YbCo2Si2

Mufti, N.; Kaneko, K.; Hoser, A.; Gutmann, M.; Geibel, C.; Krellner, C.; Stockert, O.

doi:10.1103/PhysRevB.94.045116

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Unique magnetic structure of YbCo₂Si₂

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Mufti, N.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kaneko, K.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel, C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Krellner, C.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Stockert, O.
Oliver Stockert, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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引用

Mufti, N., Kaneko, K., Hoser, A., Gutmann, M., Geibel, C., Krellner, C., & Stockert, O. (2016). Unique magnetic structure of YbCo₂Si₂. Physical Review B, 94(4):, pp. 1-8. doi:10.1103/PhysRevB.94.045116.

引用: https://hdl.handle.net/11858/00-001M-0000-002B-247D-5

要旨

We report on the results of powder and single-crystal neutron diffraction to investigate the magnetic order in YbCo2Si2 below the Neel temperature T-N = 1.7 K in detail. Two different magnetically ordered phases can clearly be distinguished. At lowest temperatures a commensurate magnetic structure with a propagation vector k(1) = (0.25 0.25 1) is found, while the intermediate phase (T > 0.9 K) is characterized by an incommensurate magnetic structure with k(2) = (0.25 0.086 1). The magnetic structure in YbCo2Si2 is in marked contrast to all other known RCo2Si2 compounds (R = rare earth element) likely due to some itineracy of the Yb 4f states being responsible for the magnetism.