Smooth transition between SMM and SCM-type slow relaxing dynamics for a 1-D assemblage of {Dy(nitronyl nitroxide)2} units

Ruina Liu; Licun Li; Xiaoling Wang; Peipei Yang; Chao Wang; Daizheng Liao; Jean-Pascal Sutter

doi:10.1039/b918554b

Smooth transition between SMM and SCM-type slow relaxing dynamics for a 1-D assemblage of {Dy(nitronyl nitroxide)2} units

Chem Commun (Camb). 2010 Apr 21;46(15):2566-8. doi: 10.1039/b918554b. Epub 2010 Mar 12.

Authors

Ruina Liu¹, Licun Li, Xiaoling Wang, Peipei Yang, Chao Wang, Daizheng Liao, Jean-Pascal Sutter

Affiliation

¹ Department of Chemistry, Nankai University, Tianjin 300071, China.

PMID: 20449309
DOI: 10.1039/b918554b

Abstract

A model example for size effects on the dynamic susceptibility behavior is provided by the chain compound [{Dy(hfac)(3)NitPhIm(2)}Dy(hfac)(3)] (NitPhIm = 2-[4-(1-imidazole)phenyl]nitronyl nitroxide radical). The Arrhenius plot reveals two relaxation regimes attributed to SMM (Delta = 17.1 K and tau(0) = 17.5 x 10(-6) s) and SCM (Delta = 82.7 K and tau(0) = 8.8 x 10(-8) s) behaviors. The ferromagnetic exchange among the spin carriers has been established for the corresponding Gd derivative.