DISCOVERY OF A QUASI-1D ORGANIC FERROMAGNET, P-NPNN
DISCOVERY OF A QUASI-1D ORGANIC FERROMAGNET, P-NPNN
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DOI：
10.1103/physrevlett.67.746
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发表时间：
1991-08-05
影响因子：
8.6
通讯作者：
KINOSHITA, M
中科院分区：
文献类型：
--
作者：
TAKAHASHI, M;TUREK, P;KINOSHITA, M
我们发现有机自由基晶体p-NPNN是由自由基上的未成对电子诱导的准一维铁磁体。三斜晶系γ相晶体的磁化强度和磁化率可以很好地用最近邻耦合J全等的S = 1/2一维海森堡铁磁体的Bethe-Annealing解来表示。低温比热和交流磁化率测量表明，晶体在0.65K发生铁磁转变，链间耦合J'约为0.1K。
We discovered that an organic radical crystal, p-nitrophenyl nitronyl nitroxide (p-NPNN), is a quasi-1D ferromagnet induced by unpaired electrons on radicals. The magnetization and the susceptibility of the triclinic gamma-phase crystal are very well represented by the Bethe-ansatz solution of the S = 1/2 1D Heisenberg ferromagnet with nearest-neighbor coupling J congruent-to 4.3 K. Low-temperature specific heat and ac susceptibility measurements revealed that the crystal undergoes a ferromagnetic transition at 0.65 K, The interchain coupling J' was estimated to be about 0.1 K.