Helical Magnetism and Structural Anomalies in Triangular lattice alpha-SrCr2O4
{alpha}-SrCr{sub 2}O{sub 4} has a triangular planar lattice of d{sup 3} Cr{sup 3+} made from edge sharing CrO{sub 6} octahedra; the plane shows a very small orthorhombic distortion from hexagonal symmetry. With a Weiss temperature of -596 K and a three-dimensional magnetic ordering temperature of 43 K, the magnetic system is quasi-two-dimensional and frustrated. Neutron powder diffraction shows that the ordered state is an incommensurate helical magnet, with an in-plane propagation vector of k = (0, 0.3217(8), 0). Temperature dependent synchrotron powder diffraction characterization of the structure shows an increase in the inter-plane spacing on cooling below 100 K and an inflection in the cell parameters at the magnetic ordering temperature. These anomalies indicate the presence of a moderate degree of magnetostructural coupling.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1041866
- Report Number(s):
- BNL-97544-2012-JA; JCOMEL; TRN: US1202717
- Journal Information:
- Journal of Physics. Condensed Matter, Vol. 23, Issue 24; ISSN 0953-8984
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nanosized helical magnetic domains in strongly frustrated
Chemical pressure effects on structural, dielectric and magnetic properties of solid solutions Mn{sub 3−x}Co{sub x}TeO{sub 6}