Geometrically Frustrated Magnets as Model Systems
Abstract
The specific aim of this research program is to understand the cooperative magnetic properties of geometrically frustrated magnets which are model systems for the general phenomena of frustration. In the past year, we have continued studies of the dynamic properties of a new type of frustrated magnetic system, the "spin ice" compound Dy2Ti2O7. The spin ice materials are a class of frustrated magnetism in which ferromagnetic interactions can be frustrated. The geometry of the lattice and the nature of the local spins in these materials demonstrate that spin ice systems represent a new modality of spin freezing in a glassy system. We have found a variety of novel behavior in these materials, in particular a crossover from thermal to quantum spin relaxation which is reverses as spin-spin correlations develop, and a reentrant behavior of the spin freezing with dilution of the magnetic sublattice. We have also initiated studies of other frustrated magnetic materials as well as frustrated arrays of ferromagnetic nanostructures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 12, 2004
- Accession Number
- ADA427515
Entities
People
- Peter Schiffer
Organizations
- Pennsylvania State University