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Chinese Physics, 2004, Vol. 13(5): 746-749    DOI: 10.1088/1009-1963/13/5/029
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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; 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.
Keywords:  spin glass      exchange interaction      ferromagnetic interaction      magnetic Prussian blues  
Received:  24 July 2003      Revised:  18 November 2003      Accepted manuscript online: 
PACS:  75.50.Lk (Spin glasses and other random magnets)  
  75.50.Dd (Nonmetallic ferromagnetic materials)  
  75.30.Et (Exchange and superexchange interactions)  
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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