Structural phase transition in the 2D spin dimer compound SrCu2(BO3)2

Structural phase transition in the 2D spin dimer compound SrCu2(BO3)2
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二维自旋二聚体化合物 SrCu2(BO3)2 中的结构相变

DOI：
10.1007/s100510170296
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发表时间：
2000
期刊：
The European Physical Journal B - Condensed Matter and Complex Systems
影响因子：
--
通讯作者：
Y. Ueda
Y. Ueda
中科院分区：
--
文献类型：
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作者：
K. Sparta;G. Redhammer;P. Roussel;G. Heger;G. Roth;P. Lemmens;A. Ionescu;M. Grove;G. Güntherodt;F. Hüning;H. Lueken;H. Kageyama;K. Onizuka;Y. Ueda

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相似文献

在二维自旋二聚体化合物SrCu2(BO3)2中发现了一种位移的二阶结构相变，相变速率为ts = 395K，从空间群i2m以下到空间群i2m以上。利用x射线衍射和拉曼散射，辅以差示扫描量热法和SQUID磁强计，研究了两相结构的温度演变。本文将讨论这种跃迁和在拉曼散射中观测到的声子异常对量子自旋系统中自旋声子和层间耦合的影响。
A displacive, 2nd order structural phase transition atTs= 395K from space group I2 m belowTsto I 4/m c m aboveTshas been discovered in the two-dimensional spin dimer compound SrCu2(BO3)2. The temperature evolution of the structure in both phases has been studied by X-ray diffraction and Raman scattering, supplemented by differential scanning calorimetry and SQUID magnetometry. The implications of this transition and of the observed phonon anomalies in Raman scattering for spin-phonon and interlayer coupling in this quantum spin system will be discussed.