Back to Search
Start Over
Nuclear and magnetic structures of the frustrated quantum antiferromagnet barlowite,Cu4(OH)6FBr
- Source :
- Physical Review Materials. 2
- Publication Year :
- 2018
- Publisher :
- American Physical Society (APS), 2018.
-
Abstract
- Barlowite, ${\mathrm{Cu}}_{4}{(\mathrm{OH})}_{6}\mathrm{FBr}$, has attracted much attention as the parent compound of a new series of quantum spin-liquid candidates, ${\mathrm{Zn}}_{x}{\mathrm{Cu}}_{4\ensuremath{-}x}{(\mathrm{OH})}_{6}\mathrm{FBr}$. While it is known to undergo a magnetic phase transition to a long-range ordered state at ${T}_{N}=15$ K, there is still no consensus over either its nuclear or magnetic structures. Here, we use comprehensive, high-flux powder neutron diffraction studies on deuterated samples of barlowite to demonstrate that the only space group consistent with the observed nuclear and magnetic diffraction at low temperatures is the orthorhombic $Pnma$ space group. We furthermore conclude that the magnetic intensity at $Tl{T}_{N}$ is correctly described by the $P{n}^{\ensuremath{'}}{m}^{\ensuremath{'}}a$ magnetic space group, which crucially allows the ferromagnetic component observed in previous single-crystal and powder magnetization measurements. As such, the magnetic structure of barlowite resembles that of the related material clinoatacamite, ${\mathrm{Cu}}_{4}{(\mathrm{OH})}_{6}{\mathrm{Cl}}_{2}$, the parent compound of the well-known quantum spin-liquid candidate hebertsmithite, ${\mathrm{ZnCu}}_{3}{(\mathrm{OH})}_{6}{\mathrm{Cl}}_{2}$.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
Magnetic structure
Neutron diffraction
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Magnetization
Crystallography
Ferromagnetism
Deuterium
0103 physical sciences
Antiferromagnetism
General Materials Science
Orthorhombic crystal system
010306 general physics
0210 nano-technology
Quantum
Subjects
Details
- ISSN :
- 24759953
- Volume :
- 2
- Database :
- OpenAIRE
- Journal :
- Physical Review Materials
- Accession number :
- edsair.doi...........a7ee5de58c5cefd4772a33742fbcdceb