Structural and magnetic properties of single-crystals of the geometrically frustrated zirconium pyrochlore, Pr 2 Zr 2 O 7
Structural and magnetic properties of single-crystals of the geometrically frustrated zirconium pyrochlore, Pr 2 Zr 2 O 7
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几何挫败锆烧绿石单晶 Pr 2 Zr 2 O 7 的结构和磁性
DOI：
10.1088/2053-1591/1/2/026109
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发表时间：
2014
影响因子：
2.3
通讯作者：
Ciomaga Hatnean M
中科院分区：
文献类型：
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作者：
Ciomaga Hatnean M
报道了用浮区法生长高质量阻挫磁体Pr 2 Zr 2 O 7晶体的实验结果。已经产生了几种晶体开始与不同水平的过剩的Pr 6 O 11，以补偿损失的Pr 2 O 3在生长过程中。晶体的X射线衍射分析表明，我们的晶体中的Pr组成（由烧绿石结构中的Pr位点占有率确定）始终略小于1。使用居里-韦斯定律拟合10 K以下的磁化率数据，揭示了Pr磁矩之间的反铁磁耦合，估计的韦斯温度为Θ W=− 2.5 K，Pr 3+的有效磁矩μ eff= 2.5 μ B。磁化强度与磁场的测量表明自旋冰状各向异性。
We report the growth of large high quality crystals of the frustrated magnet, Pr 2 Zr 2 O 7 by the floating zone technique. Several crystals have been produced starting with varying levels of excess of Pr 6 O 11 to compensate for the loss of Pr 2 O 3 during the growth process. X-ray diffraction analysis of the crystals shows that the Pr composition in our crystals, as determined by the Pr site occupancy in the pyrochlore structure, is always slightly less than 1. Fits to the magnetic susceptibility data below 10 K using a Curie–Weiss law reveal an antiferromagnetic coupling between the Pr moments, with an estimated Weiss temperature of Θ W=− 2.5 K and an effective moment for the Pr 3+ of μ eff= 2.5 μ B. Magnetization versus field measurements show a spin ice-like anisotropy.