Spin-glass state and ferromagnetic order in Cu(II)－Fe(III) cyanides
He Yun (何云)ab, Dai Yao-Dong (戴耀东)c, Huang Hong-Bo (黄红波)a, Lin Jun (林俊)a, Hsia Yuan-Fu (夏元复)a
a Department of Physics, Nanjing University, Nanjing 210093, China; b Department of Physics, Nanjing University, Nanjing 210093, China; College Physics and Information Technology, Guangxi Normal University 541004, China; c College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Abstract The static and dynamic magnetic properties of a Prussian blue analogue, molecular magnet Cu$^{\rm Ⅱ}_{3}$[Fe$^{\rm Ⅲ}$(CN)$_6$]$_2$$\cdot$3NH$_3$$\cdot$6H$_2$O were investigated in detail. The H dependence of the linear AC susceptibility, the irreversibility in the field-cooled (FC)/zero-field-cooled (ZFC) magnetization (MFC/MZFC) and the relaxation of MZFC suggest that the magnetic system can be visualized as containing a ferromagnetic cluster of spin below TC, mixed with small spin-glass clusters formed below temperature Tg less than TC. The observed magnetic properties are explained with a ferromagnetic-spin-glass phase model. The magnetic ordering of the sample occurs below 19.8K.
Received: 24 July 2003
Revised: 18 November 2003
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 19835050).
Cite this article:
He Yun (何云), Dai Yao-Dong (戴耀东), Huang Hong-Bo (黄红波), Lin Jun (林俊), Hsia Yuan-Fu (夏元复) Spin-glass state and ferromagnetic order in Cu(II)－Fe(III) cyanides 2004 Chinese Physics 13 746
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