RESEARCH ON HIGH T_C ORGANIC MAGNETS AND NON-FERMI LIQUID BEHAVIOR UNDER MULTIPLE EXTREME PHYSICAL CONDITIONS

真正的有机铁磁体的首次实现要等到1990年b-p-NPNN的合成。磁相互作用和高有序温度的机理目前还不清楚。我们在1.6GPa的压力下，用弱铁磁性有机自由基晶体（环境压力下的有序温度为36K）标记出了70K左右的磁性有序温度的最高值。本文对（Pr-La）Pb3体系进行了研究，发现了非磁性四极体系在pr的稀释极限下的非费米液体行为。相反，在较宽的pr浓度范围内，四极矩的玻璃化行为用安德森玻璃理论的特征二能级模型进行了观察。

The first realization of the genuine organic ferromagnet had to await the synthesis of b-p-NPNN in 1990. The mechanism of magnetic interactions and high ordering temperature has not been clear now. We have marked the highest value of the magnetic ordering temperature of some 70K with a weak-ferromagnetic organic radical cry stal(the ordering temperature is 36K at ambient pressure) by the application of the pressure up to 1.6GPa.The Non-Fermi liquid behavior in the non-magnetic quadrupolar system has been found in the present study on(Pr-La)Pb3 system for the dilute limit of Pr.On the contrary for the wide range of the Prconcentration, the glassy behavior of the quadrupolar moment has been observed with the characteristic 2-level model as the Anderson's glass theory.