New magnetic phenomena of rare earth polymeric complexes

作者：Sun WL^*; Liu SA; He BJ; Tang JB; Shen ZQ

来源：Physics Letters A, 2004, 328(6): 463-466.

DOI：10.1016/j.physleta.2004.06.060

• magnetic phenomena
• bithiazole
• rare earth
• polymeric complex

The preparation and magnetism of two rare earth polymeric complexes, PDTEN-Nd3+ and PMDTEN-Nd3+, which are obtained by polycondensation of 2,2';-diamino-4,4';-bithiazole (DABT) or 5,5';-dimethyl-2,2';-diamino-4,4';-bithiazole (MDABT) with glyoxal and complexation of Nd3+ are described. New magnetic phenomena of temperature dependence and applied external field dependence of magnetization of the two complexes are observed in an applied field of 20 kOe and at T = 4 K. With temperature increasing, magnetization decreases to be negative above transition temperature, at which the magnetic state converts from ferromagnetism, to diamagnetism. With applied field increasing, magnetization increases first then declines from maximum over turning point. These do not follow the behaviors expected of conventional ferromagnets.

• 出版日期2004-8-9
• 单位浙江大学