Abstract
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.
Highlights
The magnetic structure of CePt3Si is characterized by a propagation vector k = (0, 0, 1/2), but the moment direction is not known
It was assumed that the magnetic structure consisted of sheets of collinear moments aligned along an unknown axis in the a–b plane, with the sheets stacked antiferromagnetically along the c axis [9]
On the assumption of moments aligned in the basal plane, this suggested that the moment magnitude would double for a field of only 6.6 T along the c axis
Summary
The main exchange interactions have been determined from the dispersion of the somewhat damped spin-wave excitations in the magnetically ordered phase by unpolarized inelastic neutron scattering (INS) [6]. The magnetic structure of CePt3Si is characterized by a propagation vector k = (0, 0, 1/2), but the moment direction is not known.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
