Field tuning of thermally activated magnetic quantum tunnelling in Mn12 − Ac molecules
Field tuning of thermally activated magnetic quantum tunnelling in Mn12 − Ac molecules
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DOI：
10.1209/epl/i1996-00570-7
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发表时间：
1996-08
期刊：
影响因子：
1.8
通讯作者：
J. Hernàndez;X. X. Zhang-X.;F. Luis;J. Bartolomé;J. Tejada;R. Ziolo
中科院分区：
文献类型：
--
作者：
J. Hernàndez;X. X. Zhang-X.;F. Luis;J. Bartolomé;J. Tejada;R. Ziolo
Zero-field?cooled magnetization, magnetic relaxation, and a.c. susceptibility measurements have been performed on a Mn12-Ac oriented powdered sample as a function of temperature, field, and orientation. Magnetization jumps and susceptibility peaks have been observed about magnetic-field values Bn = nB1, where B1 ? 5 kG. These anomalies are due to the existence of relaxation rate maxima near Bn. From these experimental results we infer the existence of resonant spin tunnelling between degenerate excited levels of opposite spin orientation.
