High-nuclearity 3d-4f clusters as enhanced magnetic coolers and molecular magnets.
Four 52-metal-ion 3d-4f cluster complexes featuring a common core of Ln(42)M(10) (Ln = Gd(3+), Dy(3+); M = Co(2+/3+), Ni(2+)) were obtained through self-assembly of the metal ions templated by mixed anions (ClO(4)(-) and CO(3)(2-)). Magnetic studies revealed that the Gd(42)Co(10) and Gd(42)Ni(10) clusters exhibit the largest magnetocaloric effect (MCE) among any known 3d-4f complexes. Replacement of Gd(3+) ions with anisotropic Dy(3+) ions caused significant changes in the magnetic behavior of the clusters; both Dy(42)Co(10) and Dy(42)Ni(10) displayed slow relaxation of the magnetization.
State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Jun-Bo
JB
Peng
Qian-Chong
QC
Zhang
Xiang-Jian
XJ
Kong
Yan-Zhen
YZ
Zheng
Yan-Ping
YP
Ren
La-Sheng
LS
Long
Rong-Bin
RB
Huang
Lan-Sun
LS
Zheng
Zhiping
Z
Zheng