论文标题
旋转冰状态的熔化和在Pyrochlore TB2SN2O7中使用磁场的第五阶敏感性的发展
Melting of spin ice state and development of fifth order susceptibility with magnetic field in pyrochlore Tb2Sn2O7
论文作者
论文摘要
Pyrochlores提供了一个理想的操场，以研究沮丧的磁系统的磁接地状态。在这类材料中，各种磁相互作用之间的竞争仍然令人沮丧，并防止在低温下有序的磁状态。 TB2SN2O7最近由于其有序的旋冰状态引起了极大的关注。另外，在这样的系统中，外部磁场的应用可能会导致外来磁性状态。我们目前对TB2SN2O7的研究揭示了与低温和高磁场处的第五阶敏感性相关的新相。在该化合物中，在零场处，对于稳定的自旋冰态，被δ隔开的单线态态起当务之急。在磁场下，δ增加，并且据信与磁各向异性相关的采面能量会增强。这可能是该化合物中高阶矩的演变（高于10 KOE）的关键成分。
Pyrochlores offer an ideal playground to investigate the magnetic ground state of frustrated magnetic systems. In this class of materials, competition between various magnetic interactions remains frustrated and prevents an ordered magnetic state at low temperatures. Tb2Sn2O7 has recently attracted significant attention due to its ordered spin-ice state. Additionally, in such systems, application of external magnetic field might result in exotic magnetic states. Our current investigation on Tb2Sn2O7 reveal the presence of a new phase associated with fifth order susceptibility at low temperatures and high magnetic fields. In this compound, at zero fields, for a stabilized spin-ice state, the singlet-singlet state separated by δ play an imperative role. Under magnetic fields, δ increases and the Zeeman energy associated with the magnetic anisotropy is believed to get enhanced; which can be the key ingredient for evolution of higher-order moments, above 10 kOe, in this compound.
