Anisotropy: Spin order and magnetization of single-crystalline barlowite
- Univ. of Chicago, IL (United States). James Frank Inst. and Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Univ. of Chicago, IL (United States). James Frank Inst. and Dept. of Physics
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; National Science Foundation (NSF), Arlington, VA (United States). Division of Materials Research
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Despite decades-long fascination, the difficulty of maintaining high lattice symmetry in frustrated nonbipartite S = $$\frac{1}{2}$$ materials that can also be made into high-quality single crystals has been a persistent challenge. We report magnetization studies of a single-crystal sample of barlowite, Cu4 (OH)6 FBr, which has a geometrically perfect kagome motif. At T ≤ 4.2 K and 35 ≤ μ0H ≤ 65 T, the interlayer spins are fully polarized, and the kagome-intrinsic magnetization is consistent with a Heisenberg model having J/kB = -180 K. Several field-driven anomalies are observed, having varied scalings with temperature. At an applied field, kagome disorder caused by the interlayer spins is smaller than that in herbertsmithite. At T ≤ 15 K, the bulk magnetic moment comes from the interlayer spins. An almost coplanar spin order suggests that the magnitude of in-plane Dzyaloshinskii-Moriya interaction is smaller than 0.006(6) J. On the other hand, the possibility of a spin-liquid state in the kagome lattice coexisting with ordered interlayer spins is left open.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- AC52-06NA25396; FG02-99ER45789; AC02-06CH11357; DMR-1157490
- OSTI ID:
- 1457234
- Alternate ID(s):
- OSTI ID: 1257493
- Report Number(s):
- LA-UR-15-22247; PRBMDO; TRN: US1901319
- Journal Information:
- Physical Review B, Vol. 93, Issue 21; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Magnetic resonance as a local probe for kagomé magnetism in Barlowite Cu4(OH)6FBr
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journal | July 2018 |
Quantum magnetism in minerals
|
journal | July 2018 |
Gapped spin-1/2 spinon excitations in a new kagome quantum spin liquid compound Cu$_3$Zn(OH)$_6$FBr | text | January 2017 |
Quantum Magnetism in Minerals | text | January 2018 |
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