Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
6
From page :
51
To page :
56
Abstract :
We show that X-band electron paramagnetic resonance (EPR) measurements using a dual-mode resonance cavity can directly probe the levels near the top of the magnetization reversal barrier in the single-molecule magnet (SMM) Mn12-acetate. The observed transitions are much sharper than those reported in high-field EPR studies. The observed temperature dependence of the line positions points to the presence of a spin-diffusional mode. The correlation time for such fluctuations is of the order of 6×10−8 s at 10 K, and follows an Arrhenius activation energy of 35–40 K. These results open a new avenue for understanding the mechanism of tunneling and spin–lattice relaxations in these SMMs.
Journal title :
Acta Tropica
Serial Year :
2006
Journal title :
Acta Tropica
Record number :
1749657
Link To Document :
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