• 作者：Ch. Kegler ^A1 ; N. B¨¹ttgen ^A1 ; H.-A. Krug von Nidda ^A1 ; A. Krimmel ^A1 ; L. Svistov ^A1 ; B.I. Kochelaev ^A1 ; A. Loidl ^A1 ; A. Pr
• 关键词：PACS. 76.30.Fc Iron group (3d) ions and impurities (Ti-Cu) - 76.60.Es Relaxation effects - 75.30.-m Intrinsic properties of magnetically ordered materials
• 刊名：The European Physical Journal B - Condensed Matter
• 出版年：2001
• 出版时间：August 2001
• 年：2001
• 卷：22
• 期：3
• 页码：321-326
• 全文大小：275 KB

Abstract: EPR and ⁷Li NMR measurements were performed in the distorted inverse spinel V(LiCu)O₄ down to 1.5 K. Anisotropy effects on magnetic resonance spectra due to the Jahn-Teller distortion of the oxygen octahedra surrounding the copper ions are discussed. The estimation of the spin-spin interactions deduced from the EPR-relaxation rate jH reveals a situation comparable to the prototypical one-dimensional S = 1/2 Heisenberg antiferromagnet CuGeO₃. Approaching three-dimensional antiferromagnetic order ( T_N , 2 K) from above, both magnetic relaxation rates, jH_EPR and ⁷(1/T₁), respectively, exhibit nearly the same critical divergence reminding to the onset of three-dimensional order in two-dimensional layered systems.