Resonant tunnelling of the magnetization in molecular crystal of [(Mn1-xCrx)12O12(CH3COO)16(H2O)4]$\cdot$2CH3COOH$\cdot$4H2O (x=0,0.03,0
He Guang(何光)a), He Lun-Hua(何伦华)b)†, Zhang Jun-Rong(张俊荣)b), Cao Hui-Bo(曹慧波)b), Yan Li-Qin(阎丽琴)b), Wang Fang-Wei(王芳卫)b), and Yan Qi-Wei(严启伟)b)
a School of Physics & Electronic Engineering, The Central University of Nationalities, Beijing 100081, China ; b State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract The quantum tunnelling of magnetization (QTM) in single crystals of the single molecule magnet (Mn$_{1-x}$Cr$_x$)12-Ac ($x$=0, 0.03, 0.04, 0.05) has been investigated. In comparison with its parent Mn12-Ac, a greater rate of magnetization relaxation and a lower effective potential-energy barrier have been observed in Cr-doping samples. This modulation of QTM due to the Cr-doping could be attributed to the small change of $S_z$ due to the smaller spin of Cr itself and additional intrinsic but distributed transverse and longitudinal anisotropy raised by a subtle change of the local environment in the magnetic Mn12 core.
Received: 24 October 2006
Revised: 10 January 2007
Accepted manuscript online:
PACS:
75.45.+j
(Macroscopic quantum phenomena in magnetic systems)
(Magnetization curves, hysteresis, Barkhausen and related effects)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10505029).
Cite this article:
He Guang(何光), He Lun-Hua(何伦华), Zhang Jun-Rong(张俊荣), Cao Hui-Bo(曹慧波), Yan Li-Qin(阎丽琴), Wang Fang-Wei(王芳卫), and Yan Qi-Wei(严启伟) Resonant tunnelling of the magnetization in molecular crystal of [(Mn1-xCrx)12O12(CH3COO)16(H2O)4]$\cdot$2CH3COOH$\cdot$4H2O (x=0,0.03,0 2007 Chinese Physics 16 1776
[1]
Magnetic anisotropy in 5d transition metal-porphyrin molecules Yan-Wen Zhang(张岩文), Gui-Xian Ge(葛桂贤), Hai-Bin Sun(孙海斌), Jue-Ming Yang(杨觉明), Hong-Xia Yan(闫红霞), Long Zhou(周龙), Jian-Guo Wan(万建国), and Guang-Hou Wang(王广厚). Chin. Phys. B, 2021, 30(4): 047501.
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
