arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1307.4271cond-mat.str-el
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具有混合Ising / XY磁体的增强的自旋玻璃区的$_{4}$

Phase diagram with enhanced spin-glass region of mixed Ising / XY magnets LiHo$_{x}$Er$_{1-x}$F$_{4}$

J. O. Piatek, B. Dalla Piazza, N. Nikseresht, N. Tsyrulin, I. Živković, K. W. Krämer, M. Laver, K. Prokes, S. Mataš, N. B. Christensen, H. M. Rønnow

摘要:

本文给出了LiHo $_x$ Er $_{1-x}$ F $_4$(偶极耦合模型磁体的稀释系列)的实验相图,该相图是用交流磁化率和中子散射相结合的方法确定的。除了伊辛铁磁体LiHoF $_4$和XY反铁磁体LiErF $_4$之外,还确定了三个独特的相。在$x=0.86$下面,观察到嵌入的自旋玻璃相,其中自旋玻璃存在于铁磁结构内。在$x=0.57$下面观察到由冻结的针状团簇组成的Ising自旋玻璃。对于$x \sim 0.3 - 0.1$,出现反铁磁耦合的自旋玻璃。观察到的铁磁体的$T_C(x)$的减少不服从的平均场的预测,为LiHo $_x$ Y $_{1-x}$ F $_4$工作。

英文摘要:

We present the experimental phase diagram of LiHo$_x$Er$_{1-x}$F$_4$, a dilution series of dipolar-coupled model magnets.The phase diagram was determined using a combination of AC susceptibility and neutron scattering. Three unique phases in addition to the Ising ferromagnet LiHoF$_4$ and the XY anti-ferromagnet LiErF$_4$ have been identified. Below $x=0.86$ an embedded spin-glass phase is observed, where a spin-glass exists within the ferromagnetic structure. Below $x=0.57$ an Ising spin-glass is observed consisting of frozen needle-like clusters. For $x \sim 0.3 - 0.1$ an antiferromagnetically coupled spin-glass occurs. A reduction of $T_C(x)$ for the ferromagnet is observed which disobeys the mean-field predictions that worked for LiHo$_x$Y$_{1-x}$F$_4$.

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。

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