Magnetic characterization of the sawtooth-lattice olivines ZnL{sub 2}S{sub 4} (L=Er,Tm,Yb)
Magnetic characterization of the sawtooth-lattice olivines ZnL{sub 2}S{sub 4} (L=Er,Tm,Yb)
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锯齿晶格橄榄石ZnL{sub 2}S{sub 4} (L=Er,Tm,Yb)的磁性表征
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. Cava
中科院分区：
文献类型：
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作者：
G. Lau;B. Ueland;R. S. Freitas;M. Dahlberg;P. Schiffer;R. Cava
本文报道了具有磁性的稀土离子呈潜在受挫构型的橄榄石的磁性质，这些橄榄石中的磁性稀土离子是由角共用三角形的锯齿链组成的。Er，Tm和Yb化合物的高温磁化率分别为{theta}{subW}{近似等于}-4，-13和-75K的居里-魏斯温度。没有一种化合物在T=1.8K以上表现出磁性长程有序性。在{theta}{subW}附近缺乏有序性可能是由于结构的低维性或三角形几何结构的阻碍效应。
We report the magnetic properties of the ZnL{sub 2}S{sub 4} (L=Er,Tm,Yb) olivines, in which the magnetic lanthanide ions are in a potentially frustrated geometry consisting of sawtooth chains of corner-sharing triangles. Fits to the high-temperature magnetic susceptibility yielded Curie-Weiss temperatures of {theta}{sub W}{approx_equal}-4, -13, and -75 K for the Er, Tm, and Yb compounds, respectively. None of the compounds displayed magnetic long-range order above T=1.8 K. The lack of ordering at temperatures near {theta}{sub W} may be attributed to either the low dimensionality of the structure or the frustrating effect of the triangular geometry.