Spin-singlet formation in the geometrically frustrated spinel oxide AlV2O4: 51V and 27A l NMR measurements

Yasuhiro Shimizu, Moe Tanaka, Masayuki Itoh, Takuro Katsufuji

研究成果: Article査読

16 被引用数 (Scopus)


We report V 51 and A 27 l NMR studies of the spin-frustrated spinel oxide AlV2 O4 in a temperature range from 850 to 2 K across a structural phase transition at 700 K. Knight shifts and nuclear spin-lattice relaxation rates at the V and Al sites show that the local spin susceptibility at two V sites diminishes at low temperatures in the insulating state, giving direct evidence for the spin-singlet formation. In addition to the singlet spins, one of the two Al sites probes paramagnetic spins with the Curie-Weiss behavior and the spin-glass transition. The results demonstrate coexistence of the spin-singlet cluster and the nearly free spins, anticipated from a theoretical model and the bulk magnetic-susceptibility measurements.

ジャーナルPhysical Review B - Condensed Matter and Materials Physics
出版ステータスPublished - 2008 10 28

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


「Spin-singlet formation in the geometrically frustrated spinel oxide AlV<sub>2</sub>O<sub>4</sub>: <sup>51</sup>V and <sup>27</sup>A l NMR measurements」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。