arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.4402cond-mat.str-el
收藏

准二维S = 1/2海森堡反铁磁体[Cu(pyz)2(HF2)] PF6的磁性

Magnetic properties of the quasi-two-dimensional S = 1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6

E. Cizmar, S. A. Zvyagin, R. Beyer, M. Uhlarz, M. Ozerov, Y. Skourski, J. L. Manson, J. A. Schlueter, J. Wosnitza

摘要:

报道了准二维自旋1/2海森堡反铁磁体[Cu(pyz)2(HF 2)] PF 6的高场磁化强度、比热容和电子自旋共振(ESR)研究.在平均场理论的框架下描述了TN = 4.38 K以下ESR模的频场图,证实了具有易面各向异性的共线磁结构。所获得的结果使我们能够确定各向异性/交换相互作用比,A/J = 0.003,以及平面间/平面内交换相互作用比的上限,J '/J = 1/16。有人认为,尽管发病的3D长程磁有序的这种材料的磁特性(包括高磁场磁化和非单调场依赖的尼尔温度)的强烈影响,由二维自旋相关。

英文摘要:

We report on high-field magnetization, specific-heat and electron spin resonance (ESR) studies of the quasi-two-dimensional spin-1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6. The frequency-field diagram of ESR modes below TN = 4.38 K is described in the frame of the meanfield theory, confirming a collinear magnetic structure with an easy-plane anisotropy. The obtained results allowed us to determine the anisotropy/exchange interaction ratio, A/J = 0.003, and the upper limit for the inter/intra-plane exchange-interaction ratio, J'/J = 1/16. It is argued that despite the onset of 3D long-range magnetic ordering the magnetic properties of this material (including high-magnetic-field magnetization and non-monotonic field dependence of the Neel temperature) are strongly affected by two-dimensional spin correlations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑