We studied kagome-like magnets, SrVx Ga12-x O19 with V3+ (3 d2 in the triply degenerate t2g states), as a geometrically frustrated spin system with orbital degrees of freedom. We observed a suppression of low-temperature spin entropy and an anomalous contraction of the V triangles on the kagome lattice, which can be regarded as the V trimerization with spin-singlet formation. This result, which is in clear contrast to their Cr3+ (3 d3) analogs exhibiting a spin-liquid behavior, indicates a substantial impact of orbitals on geometrically frustrated magnets.
|ジャーナル||Physical Review B - Condensed Matter and Materials Physics|
|出版物ステータス||Published - 2009 5 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics