Phase Diagram and Soliton Picture of a Spin-Peierls Compound D-F5PNN
Phase Diagram and Soliton Picture of a Spin-Peierls Compound D-F5PNN
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DOI：
10.7566/jpsj.86.113706
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发表时间：
2017-11-15
影响因子：
1.7
通讯作者：
Boucher, Jean-Paul
中科院分区：
文献类型：
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作者：
Inagaki, Yuji;Kawae, Tatsuya;Boucher, Jean-Paul
我们研究了S=1/2准一维有机反铁磁体D-F5PNN的磁性质，其磁化温度低至0.5K。在磁场-温度面上观察到三种不同的相，包括均匀的、二聚化的(D)和无公度的(I)自旋结构，在场扫描测量中，DI相变之间出现了显著的滞后。磁振子(S=1)和孤子(S=1/2)激发的组合成功地重现了观测到的磁化率。此外，这种激发提供了对依赖于温度的电子自旋共振(ESR)谱的合理解释。这些结果表明D-F5PNN是研究自旋-Peierls相变的理想候选者。
We investigate magnetic properties of an S = 1/2, quasi-one dimensional organic antiferromagnet, D-F5PNN using magnetization measurements taken at temperatures as low as 0.5 K. Three distinct phases were observed consisting of uniform, dimerized (D), and incommensurate (I) spin structures in the magnetic field versus temperature plane, where a significant hysteresis appears between DI transitions in the field scan measurements. A combination of magnon (S = 1) and soliton (S = 1/2) excitations have successfully reproduced the observed magnetic susceptibility. In addition, such excitations provide a reasonable interpretation of the temperature dependent electron spin resonance (ESR) spectra. These results indicate that D-F5PNN is an ideal candidate for studying the spin-Peierls transition.