The -magnetization plateau state in the 2D quantum antiferromagnet SrCu2(BO3)2: spin superstructure, phase transition, and spin dynamics studied by high-field NMR
The -magnetization plateau state in the 2D quantum antiferromagnet SrCu2(BO3)2: spin superstructure, phase transition, and spin dynamics studied by high-field NMR
复制标题
二维量子反铁磁体 SrCu2(BO3)2 中的 磁化平台态：通过高场 NMR 研究自旋超结构、相变和自旋动力学
DOI：
10.1016/j.physb.2004.01.014
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发表时间：
2004
影响因子：
2.8
通讯作者：
F. Mila
中科院分区：
文献类型：
--
作者：
M. Takigawa;K. Kodama;M. Horvatić;C. Berthier;H. Kageyama;Y. Ueda;S. Miyahara;F. Becca;F. Mila
本文报道了在28T附近的强磁场下，对准二维二聚体单态自旋体系SRCu{sub2}(BO{sub3}){sub2}的1/8磁化平台相中自旋超结构的核磁共振观测。1/8相的特征是在一个具有振荡磁化强度的菱形晶胞中形成三线态，并通过一级相变与均匀相分离。通过对Shastry-Sutherland模型的铜和B核磁共振谱与理论计算的比较，我们能够确定三维自旋超结构。我们还发现，磁性层屈曲的微妙结构特征产生了各向异性相互作用，这导致了场感应交错磁化。
We report the NMR observation of spin superstructure in the 1/8 magnetization plateau phase of SrCu{sub 2}(BO{sub 3}){sub 2}, a quasi-2D dimer singlet spin system, at high magnetic fields near 28 T. The 1/8 phase is characterized by crystalization of triplets in a rhomboid unit cell with oscillating magnetization and separated from uniform phase by a first-order transition. Comparison between the Cu and B NMR spectra and theoretical calculations on the Shastry-Sutherland model enabled us to determine the three-dimensional spin superstructure. We also found that subtle structural feature of the buckling of magnetic layers produces anisotropic interactions, which lead to field-induced staggered magnetization.
影响因子：
3.7
作者：
Miyahara, S;Becca, F;Mila, F
通讯作者：
Mila, F