Nocera Daniel G, Bartlett Bart M, Grohol Daniel, Papoutsakis Dimitris, Shores Matthew P
Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA.
Chemistry. 2004 Aug 20;10(16):3850-9. doi: 10.1002/chem.200306074.
A kagomé antiferromagnet presents an ideal construct for studying the unusual physics that result from the placement of magnetically frustrated spins on a low-dimensional lattice. Jarosites are the prototype for a spin-frustrated magnetic structure, because these materials are composed exclusively of kagomé layers. Notwithstanding, jarosite-type materials have escaped precise magnetic characterization over the past three decades, because they are notoriously difficult to prepare in pure and single-crystal forms. These hurdles have been overcome with the development of redox-based hydrothermal methods. Armed with pure and crystalline materials, several perplexing issues surrounding the magnetic properties of the jarosites have been resolved, yielding a detailed and comprehensive picture of the ground-state physics of this kagomé lattice.
对于研究因在低维晶格上放置磁阻挫自旋而产生的异常物理现象而言， Kagomé反铁磁体是一种理想的结构。黄钾铁矾是自旋阻挫磁结构的原型，因为这些材料仅由Kagomé层组成。尽管如此，在过去三十年里，黄钾铁矾类材料一直未能得到精确的磁学表征，因为它们极难制备成纯净的单晶形式。基于氧化还原的水热法的发展克服了这些障碍。有了纯净的晶体材料，围绕黄钾铁矾磁性质的几个令人困惑的问题得到了解决，从而对这种Kagomé晶格的基态物理有了详细而全面的认识。
