Magnetic correlations in the extended Kagome YBaCo{sub 4}O{sub 7} probed by single-crystal neutron scattering.

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.103.037202· OSTI ID:961726

Manuel, P; Chapon, L C; Radaelli, P G; Zheng, H; Mitchell, J F

We have studied the frustrated system YBaCo{sub 4}O{sub 7.0} generally described as an alternating stacking of kagome and triangular layers of magnetic ions on a trigonal lattice, by single-crystal neutron diffraction experiments above the Neel ordering transition. Experimental data reveal pronounced magnetic diffuse scattering, which is successfully modeled by direct Monte Carlo simulations. Long-range magnetic correlations are found along the c axis, due to the presence of corner-sharing bipyramids, creating quasi-one-dimensional order at finite temperature. In contrast, in the kagome layers (ab plane), the spin-spin correlation function, displaying a short-range 120{sup o} configuration, decays rapidly as typically found in spin liquids. YBaCo{sub 4}O{sub 7} experimentally realizes a new class of two-dimensional frustrated systems where the strong out-of-plane coupling does not lift the in-plane degeneracy, but instead acts as an external 'field'.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961726
• Report Number(s): ANL/MSD/JA-64326
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 2009 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONFIGURATION
CORRELATION FUNCTIONS
DIFFUSE SCATTERING
ELEVATORS
NEUTRON DIFFRACTION
NEUTRONS
SCATTERING
SPIN
TRIGONAL LATTICES