Frustrated magnetic cycloidal structure and emergent Potts nematicity in CaMn 2 P 2
Journal Article
·
· Physical Review. B
- Ames Lab., and Iowa State Univ., Ames, IA (United States)
- Univ. of Missouri, Columbia, MO (United States)
- Ames Lab., Ames, IA (United States)
We report neutron-diffraction results on single-crystal CaMn2P2 containing corrugated Mn honeycomb layers, and we determine its ground-state magnetic structure. The diffraction patterns consist of prominent (1/6,1/6, L ) reciprocal-lattice unit (r.l.u.; L = integer) magnetic Bragg reflections, whose temperature-dependent intensities are consistent with a first-order antiferromagnetic phase transition at the Néel temperature TN = 70 (1) K. Our analysis of the diffraction patterns reveals an in-plane 6 × 6 magnetic unit cell with ordered spins that in the principal-axis directions rotate by 60°steps between nearest neighbors on each sublattice that forms the honeycomb structure, consistent with the PAc magnetic space group. We find that a few other magnetic subgroup symmetries (PA2/c, PC2/m, PS1, PC2, PCm, PS1) of the paramagnetic $$P\bar{3}m11'$$ crystal symmetry are consistent with the observed diffraction pattern. We relate our findings to frustrated J1-J2-J3 Heisenberg honeycomb antiferromagnets with single-ion anisotropy and the emergence of Potts nematicity.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1959191
- Report Number(s):
- IS-J 11,005
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 5 Vol. 107; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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