Magnetic phase diagram of Sr2-xLaxIrO4 synthesized by mechanical alloying
Magnetic phase diagram of Sr2-xLaxIrO4 synthesized by mechanical alloying
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DOI：
10.1103/physrevb.97.064425
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发表时间：
2018-02
影响因子：
3.7
通讯作者：
K. Horigane;M. Fujii;H. Okabe;K. Kobayashi;R. Horie;H. Ishii;Y. Liao;Y. Kubozono;A. Koda;R. Kadono;J. Akimitsu
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文献类型：
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作者：
K. Horigane;M. Fujii;H. Okabe;K. Kobayashi;R. Horie;H. Ishii;Y. Liao;Y. Kubozono;A. Koda;R. Kadono;J. Akimitsu
本文报道了用机械合金化法合成的Sr 2-xLaxIrO 4的晶体结构和物理性能。磁转变温度T-N和电阻率随着La掺杂的增加而降低，与以前涉及单晶样品的研究一致。我们还确定了T-N与四倍体畸变（c/a）之间的关系。这一结果表明，Sr 214系统的磁性与其晶体结构密切相关。零场μ子自旋旋转/弛豫研究表明，在Sr1.9La0.1IrO4中实现了短程反铁磁有序，自旋玻璃态在低温区稳定.由纵向场μ SR结果估计的Ir矩为0.045 μ（B），比Sr 2 IrO 4的Ir矩（类似于0.4 μ（B））小10倍，表明电子被引入到Ir原子中。
We report the crystal structure and physical properties of Sr2-xLaxIrO4 synthesized by mechanical alloying. The magnetic transition temperature T-N and electrical resistivity decreased with increasing La doping, consistent with previous studies involving single-crystalline samples. We also identified the relationship between T-N and tetragonal distortion (c/a) in this system. This result suggests that the magnetism of the Sr214 system is strongly correlated with its crystal structure. Zero-field muon spin rotation/relaxation studies revealed that short-range antiferromagnetic ordering is realized in Sr1.9La0.1IrO4; also, the spin-glass state is stabilized in the low-temperature region. The Ir moment estimated from the longitudinal field mu SR results is 0.045 mu(B), ten times smaller than that of Sr2IrO4 (similar to 0.4 mu(B)), indicating that electrons are introduced into the Ir atoms.