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Journal Article

Magnetic-field-enhanced aniferromagnetism in the noncentrosymmetric heavy-fermion superconductor CePt3Si

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

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Citation

Kaneko, K., Stockert, O., Fåk, B., Raymond, S., Skoulatos, M., Takeuchi, T., et al. (2014). Magnetic-field-enhanced aniferromagnetism in the noncentrosymmetric heavy-fermion superconductor CePt3Si. Physical Review B, 89(24): 241105, pp. 1-5. doi:10.1103/PhysRevB.89.241105.


Cite as: https://hdl.handle.net/11858/00-001M-0000-001A-2638-2
Abstract
The effect of magnetic field on the static and dynamic spin correlations in the noncentrosymmetric heavy-fermion superconductor CePt3Si was investigated by neutron scattering. The application of a magnetic field B increases the antiferromagnetic (AFM) peak intensity. This increase depends strongly on the field direction: for B parallel to[0 0 1] the intensity increases by a factor of 4.6 at a field of 6.6 T, which corresponds to more than a doubling of the AFM moment, while the moment increases by only 10% for B parallel to[1 0 0] at 5 T. This is in strong contrast to the inelastic response near the antiferromagnetic ordering vector, where no marked field variations are observed for B parallel to[0 0 1] up to 3.8 T. The results reveal that the AFM state in CePt3Si, which coexists with superconductivity, is distinctly different from other unconventional superconductors.