Magnetic structure of the noncentrosymmetric heavy-fermion superconductor CePt3Si

International Conference on Polarised Neutrons for Condensed Matter Investigations

Fak, B.^1 ; Enderle, M.^1 ; Lapertot, G.^2

Institut Laue-Langevin, CS 20156, Grenoble Cedex 9

F-38042, France^1

Université Grenoble-Alpes and Commissariat A l'Energie Atomique, INAC-Pheliqs, Grenoble

F-38000, France^2

关键词: Basal planes;    CePt3Si;    Magnetic phase transitions;    Non-centrosymmetric;    Polarization analysis;    Polarized neutron scattering;    Second orders;    Superconducting state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/862/1/012006/pdf
DOI  :  10.1088/1742-6596/862/1/012006

来源: IOP

【 摘 要 】

We have studied the magnetic structure of the noncentrosymmetric heavy-fermion superconductor CePt3Si using elastic polarized neutron scattering with field-projected (longitudinal) XYZ polarization analysis. We find that the magnetic moment has components both in the tetragonal basal plane and along the tetragonal four-fold axis. Such a magnetic structure is not symmetry-allowed if the magnetic phase transition is second order, and may imply that CePt3Si has lower symmetry in the superconducting state than originally thought.