Chin. Phys. Lett.  2008, Vol. 25 Issue (7): 2631-2633    DOI:
Original Articles |
Shape Dependence of Low-Temperature Magnetic Relaxation of Mn12Ac
LIU Hai-Qing, SU Shao-Kui, JING Xiu-nian, LIU Ying, LI Yan-rong, HE Lun-Hua, GE Pei-Wen, YAN Qi-Wei, WANG Yun-Ping
Beijing National Laboratory of Condensed matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
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LIU Hai-Qing, SU Shao-Kui, JING Xiu-nian et al  2008 Chin. Phys. Lett. 25 2631-2633
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Abstract We report the discovery that the low-temperature magnetic relaxation in Mn12Ac single crystals strongly depends on the shape of the samples. The relaxation time exhibits a minimum at the phase transition point between ferromagnetic and antiferromagnetic phases. The shape dependence is attributed to the dipolar interaction between molecular magnets.
Keywords: 73.40.Gk      75.30.Gw      75.40.-s      75.60.Ej     
Received: 30 May 2008      Published: 26 June 2008
PACS:  73.40.Gk (Tunneling)  
  75.30.Gw (Magnetic anisotropy)  
  75.40.-s (Critical-point effects, specific heats, short-range order)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I7/02631
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LIU Hai-Qing
SU Shao-Kui
JING Xiu-nian
LIU Ying
LI Yan-rong
HE Lun-Hua
GE Pei-Wen
YAN Qi-Wei
WANG Yun-Ping
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