Quantum tunneling and magnetic relaxation in Mn12 chloropropionate -: art. no. 052402

被引：11

作者：

Yoon, SW ^{[1
]}

Heu, M

Jeon, WS

Jung, DY

Suh, BJ

Yoon, S ^{[1
]}

机构：

[1] Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea

[2] Sungkyunkwan Univ, Dept Chem, Suwon 440746, South Korea

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.67.052402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have synthesized the single-molecule magnet Mn-12 chloropropionate and performed magnetization measurements in an applied field parallel to the easy axis of magnetization of the crystal. We found the spin S = 10 ground state and observed distinct steps in the hysteresis loops, typical of quantum tunneling of magnetization. The effective barrier height has been determined from the analyses of magnetization curves M(T) and M(H), and also from the magnetic relaxation measurements. Magnetic relaxation follows the stretched exponential law above 2 K. Compared to Mn-12 acetate, the relaxation rate is enhanced significantly at resonance fields, while it is more or less the same at off-resonance fields. We ascribe this observation to the transverse anisotropy in Mn-12 chloropropionate.

引用

页数：4

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