CMT107

Magnetic field effects on neutron diffraction in the antiferromagnetic phase of UPt₃

• Author(s): Juana Moreno and J. A. Sauls
• Address: Department of Physics & Astronomy, Northwestern University, Evanston, IL 60208
• Date: April 3, 2000
• Journal: Physical Review B 63, 024419 (2000) [DOI] [PDF]
• Abstract: We discuss possible magnetic structures in UPt₃ based on our analysis of elastic neutron-scattering experiments in high magnetic fields at temperatures T < T_N. The existing experimental data are compatible with a true antiferromagnetic order displaying a single-q antiferromagnetic structure with three independent domains. For modest in-plane spin-orbit interactions, the Zeeman coupling between the antiferromagnetic order parameter and the magnetic field induces a rotation of the magnetic moments, but not an adjustment of the propagation vector of the magnetic order. A triple-q magnetic structure is also consistent with neutron experiments, but in general leads to a nonuniform magnetization in the crystal. New experiments involving higher fields and polarized neutrons could decide between these structures.
  Comment: 7 pages, 5 figures
  Discussion:
  • Comment by B. Fåk, et al., Phys. Rev. B 66, 216401 (2002). [DOI]
  • Reply by Juana Moreno and J. A. Sauls, Phys. Rev. B 66, 216402 (2002). [DOI]

• Eprint: [PDF] [arXiv]

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