Abstract
The magnetism and crystallographic properties of layered iron pnictide and chalcogenide compounds are reviewed. These materials contain square nets of formally divalent iron in edge-sharing tetrahedral coordination. Many of the compounds can be made superconducting with suitable doping or application of pressure, with maximum superconducting transition temperatures exceeding 50. K. There is compelling experimental and theoretical evidence for strong coupling between the magnetism and crystal structure in these materials, and magnetism is expected to be involved in the superconducting pairing mechanism. Relationships among the crystal structures, magnetic properties, and superconductivity are discussed. These include correlations among magnetic moment sizes; crystallographic, magnetic, and superconducting transition temperatures; lattice parameters, interatomic distances; and coordination geometries, as well as the structural response to the chemical substitutions that are used to tune the materials from long-range magnetic order to superconductivity.
| Original language | English |
|---|---|
| Title of host publication | Handbook of Magnetic Materials |
| Publisher | Elsevier B.V. |
| Pages | 381-463 |
| Number of pages | 83 |
| DOIs | |
| State | Published - 2014 |
Publication series
| Name | Handbook of Magnetic Materials |
|---|---|
| Volume | 22 |
| ISSN (Print) | 1567-2719 |
Funding
This work was supported by the US Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division, and was made possible by fruitful discussions and ongoing collaborations with many colleagues, including among others, Athena Sefat, Brian Sales, David Mandrus, David Singh, Andrew Christianson, Mark Lumsden, and Raphaël Hermann.
Keywords
- Antiferromagnetism
- Crystal structure
- Crystallographic phase transitions
- Iron chalcogenide
- Iron pnictide
- Itinerant magnetism
- Magnetoelastic coupling
- Structure-property relationships
- Superconductivity