Bordelon Mitchell M, Wang Xiaoling, Pajerowski Daniel M, Banerjee Arnab, Sherwin Mark, Brown Craig M, Eldeeb M S, Petersen T, Hozoi L, Rӧßler U K, Mourigal Martin, Wilson Stephen D
Materials Department, University of California, Santa Barbara, California 93106, USA.
Department of Physics and Center for Terahertz Science and Technology, University of California, Santa Barbara, California 93106, USA.
Phys Rev B. 2021 Sep;104(9). doi: 10.1103/PhysRevB.104.094421.
The magnetic ground state and the crystalline electric field level scheme of the triangular lattice antiferromagnet are investigated. Below mK, develops signatures of magnetic order in specific heat measurements and low energy inelastic neutron scattering data. Trivalent ions in the local environment of this compound exhibit large splittings among the lowest three Kramers doublets defining for the free ion the sextet and a ground state doublet with dipole character, consistent with recent theoretical predictions in M. S. Eldeeb Phys. Rev. Materials 4, 124001 (2020). An unexplained, additional local mode appears, and potential origins of this anomalous mode are discussed.
研究了三角晶格反铁磁体的磁性基态和晶体电场能级图。在低于毫开尔文温度时，在比热测量和低能非弹性中子散射数据中出现了磁有序的特征。该化合物局部环境中的三价离子在最低的三个克莱默斯二重态之间表现出大的分裂，为自由离子定义了六重态和具有偶极特性的基态二重态，这与M. S. Eldeeb在《物理评论材料》4, 124001 (2020)中的最新理论预测一致。出现了一个无法解释的额外局域模，并讨论了这种反常模的潜在起源。
