铒基单离子磁体中的慢磁弛豫机制。
Slow magnetic relaxation mechanisms in erbium SIMs.
作者信息
Silva M Ramos, Martín-Ramos P, Coutinho J T, Pereira L C J, Lavín V, Martín I R, Silva P S Pereira, Martín-Gil J
机构信息
CEMDRX, Physics Department, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal.
出版信息
Dalton Trans. 2015 Jan 21;44(3):1264-72. doi: 10.1039/c4dt02767a.
The magnetic properties of two similar Er(3+) complexes have been investigated. [Er(tpm)3(bipy)] (Htpm = 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione and bipy = 2,2'-bipyridine) displays thermally activated slow relaxation of magnetisation under a zero direct-current (DC) field. Under an applied HDC field of 1000 G, [Er(tpm)3(bipy)] exhibits two thermally activated processes with energy barriers of 9 and 40 K, while [Er(tfa)3(bipy)] (Htfa = 4,4,4-trifluoro-1-(2-furyl)-1,3-butanedione) shows only one activated process with a barrier of 15 K. Both compounds are luminescent in the solid state, emitting in the near IR region.
已对两种相似的铒（Ⅲ）配合物的磁性进行了研究。[Er(tpm)₃(bipy)]（Htpm = 1,1,1 - 三氟 - 5,5 - 二甲基 - 2,4 - 己二酮，bipy = 2,2'-联吡啶）在零直流（DC）场下表现出热激活的磁化强度缓慢弛豫。在1000 G的外加直流磁场下，[Er(tpm)₃(bipy)]呈现出两个能量势垒分别为9 K和40 K的热激活过程，而[Er(tfa)₃(bipy)]（Htfa = 4,4,4 - 三氟 - 1 - (2 - 呋喃基)-1,3 - 丁二酮）仅显示出一个势垒为15 K的激活过程。两种化合物在固态下均发光，在近红外区域发射。
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