Monopole-limited nucleation of magnetism in Eu2Ir2O7
Monopole-limited nucleation of magnetism in Eu2Ir2O7
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DOI：
10.1103/physrevb.101.174435
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
G. Prando;Prachi Telang;Stephen D. Wilson;M. Graf;Surjeet Singh
中科院分区：
文献类型：
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作者：
G. Prando;Prachi Telang;Stephen D. Wilson;M. Graf;Surjeet Singh
我们深入分析了 Eu$_{2}$Ir$_{2}$O$_{7}$ 在 Eu$_{1-x}$Bi$_{x}$ 等价和抗磁性取代以及外部压力作用下的 μ 子自旋光谱测量。我们的结果证明，仅对于化学计量的Eu$_{2}$Ir$_{2}$O$_{7}$，随着温度降低，磁性体积分数异常缓慢增加，这表明其中发展的磁性相具有高度非常规的性质。我们认为，Eu$_{2}$Ir$_{2}$O$_{7}$ 中的磁性是基于 $T_{N}$ 处磁性液滴的成核而发展的，其连续生长受到连续生成磁性刺猬单极子的限制。
We present an in-depth analysis of muon-spin spectroscopy measurements of Eu$_{2}$Ir$_{2}$O$_{7}$ under the effect of the Eu$_{1-x}$Bi$_{x}$ isovalent and diamagnetic substitution as well as of external pressure. Our results evidence an anomalously slow increase of the magnetic volume fraction upon decreasing temperature only for stoichiometric Eu$_{2}$Ir$_{2}$O$_{7}$, pointing towards highly unconventional properties of the magnetic phase developing therein. We argue that magnetism in Eu$_{2}$Ir$_{2}$O$_{7}$ develops based on the nucleation of magnetic droplets at $T_{N}$, whose successive growth is limited by the need of a continuous generation of magnetic hedgehog monopoles.