Heat capacity study of the doping effect of paramagnetic radicals on the organic spin-peierls system (p-CyDOV radical crystal)
Heat capacity study of the doping effect of paramagnetic radicals on the organic spin-peierls system (p-CyDOV radical crystal)
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顺磁自由基对有机自旋-peierls体系（p-CyDOV自由基晶体）掺杂效应的热容研究
DOI：
10.1143/jpsj.72.2312
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发表时间：
2003
影响因子：
1.7
通讯作者：
K. Takeda*
中科院分区：
文献类型：
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作者：
K. Mukai;Masanobu Yanagimoyo;Shuichi Tanaka;M. Mito;T. Kawae;K. Takeda*
用热容量法研究了顺磁性有机自由基杂质(p-CyDTV)掺杂对p-CyDOV(3-(4-cyanophenyl)-1，5-dimethyl-6-oxoverdazyl；有机自旋-Peiels(SP)体系的影响(SP转变温度TSP=15.0K)。在低于1K的低温下，在TN(X)温度下，杂质浓度(X)较小的每个体系都有一个很尖锐的热容峰；T N(0)=0.135 K(±0.002 K)，T N(0.0 1)=0.290 K，T N(0.0 7)=0.164 K。对于x=0的体系，峰的出现被认为是由于纯p-CyDOV中不可避免的微量杂质所致。从TN(X)，TN(0)<；TN(0.01)的依赖关系和热容对x的行为，解释了x=0和0.01的峰伴随着SP相中的三维(3D)反铁磁(AFM)相变。而高杂质x=0.07时的T_N(X)比x=0.01时的T_N(X)的减小可以解释为从高杂质x=0.07到x=0.01的三维原子力显微镜的转变。
The doping effect of paramagnetic organic radical impurities ( p -CyDTV) on the organic spin–Peiels (SP) system of p -CyDOV (3-(4-cyanophenyl)-1,5-dimethyl-6-oxoverdazyl; the SP transition temperature T SP =15.0 K) was studied by the heat capacity measurement down to 0.1 K. At low temperatures below 1 K, quite a sharp heat capacity peak was detected for each system with small impurity concentration ( x ) at the temperature T N ( x ); T N (0)=0.135 K (±0.002 K), T N (0.01)=0.290 K and T N (0.07)=0.164 K. The appearance of the peak for the system with x =0 is considered to be due to minute and inevitable impurities in the pure p -CyDOV. From the dependence of T N ( x ), T N (0)< T N (0.01), and the heat capacity behavior on x , the peaks for x =0 and 0.01 are explained to be accompanied with the three-dimensional (3D) antiferromagnetic (AFM) transition in the SP phase. While the decrease of T N ( x ) for higher impurities x =0.07 than that for x =0.01 may be interpreted as merely a 3D AFM transition from th...
J.B.Jamali：“非磁性杂质对 3-(4-氰基苯基)-1,5-二甲基-6-氧代达唑基自由基晶体 p-CyDOV 自旋 Peierls 跃迁的影响”。
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