ePubs
The open archive for STFC research publications
Home
About ePubs
Content Policies
News
Help
Privacy/Cookies
Suggest an Enhancement
Contact ePubs
Full Record Details
Persistent URL
http://purl.org/net/epubs/work/35949
Record Status
Checked
Record Id
35949
Title
Ordering on geometrically frustrating lattices: The perspective of TOF neutron crystallography
Contributors
PG Radaelli (CCLRC Rutherford Appleton Lab.)
,
LC Chapon (CCLRC Rutherford Appleton Lab.)
,
MJ Gutmann (CCLRC Rutherford Appleton Lab.)
,
A Bombardi
,
GR Blake
,
M Schmidt
,
S-W Cheong
Abstract
Geometrical frustration arises when geometrical constraints promote a locally degenerate ground state. A periodic system with this local geometry may "freeze" on cooling forming "ices" or remain liquid down to the lowest temperatures due to quantum effects. A third possibility is that of a structural phase transition that lowers the local symmetry and lifts the degeneracy. Two classic examples of geometrical frustration are the so-called pyrochlore lattice, which is also found in AB2X4 spinels, and the "J1-J2" model on a square lattice, which involves competing nearest- and next-near-neighbor magnetic interactions. We present recent results obtained by time-of-flight (TOF) neutron powder diffraction on orbital ordering in transition-metal spinels, leading to the concept of orbitally-driven Peierls state, and more recent data on MoOVO4, a realization of the J1-J2 model. A surge of interest in the so-called multiferroic materials has led to revisit the role of geometrical frustration in coupling different degrees of freedom. In this context, we present recent results on REMn2O5 obtained by neutron single-crystal and powder diffraction.
Organisation
CCLRC
,
ISIS
,
ISIS-GEM
,
ISIS-SXD
,
ISIS-ESRF
Keywords
ISIS 2007
,
Geometrical frustration
,
Physics
,
Magnetic structures
,
Multiferroics
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Physica B
385 (2006): 29-34. Is in proceedings of: International Conference n Neutron Scattering - 2005 (ICNS 2005), Sydney, Australia, September 2005.
doi:10.1016/j.physb.2006.05.092
2006
Showing record 1 of 1
Recent Additions
Browse Organisations
Browse Journals/Series
Login to add & manage publications and access information for OA publishing
Username:
Password:
Useful Links
Chadwick & RAL Libraries
SHERPA FACT
SHERPA RoMEO
SHERPA JULIET
Journal Checker Tool
Google Scholar