Enhancement of Jahn-Teller isomerism in Mn12Ac under high quasi-hydrostatic pressure
Enhancement of Jahn-Teller isomerism in Mn12Ac under high quasi-hydrostatic pressure
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高准静水压下 Mn12Ac 中 Jahn-Teller 异构现象的增强
DOI：
10.1103/physrevb.67.132402
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发表时间：
2003
影响因子：
3.7
通讯作者：
K. Awaga
中科院分区：
文献类型：
--
作者：
Yoshihito Suzuki;K. Takeda;K. Awaga
用小型Be-Cu高压池和超导量子干涉仪研究了Mn 12 O 12（O2 CCH 3）16（H2O）4（Mn 12 Ac）在2.0K高准静水压力下的行为.在这些条件下，Mn 1 2 Ac表现为单分子磁体，并且，随着压力的增加，阶梯磁化曲线经历逐渐的形状变化。这些变化中最具特征的是零场中的阶跃的增强。从扫描速率依赖这些变化的分析，零场的变化是由于一个静态的效果，最有可能是一个过渡的Mn 1 2 Ac之间的Jahn-Teller异构体。
The behavior of Mn 1 2 O 1 2 (O 2 CCH 3 ) 1 6 (H 2 O) 4 (Mn 1 2 Ac) under high quasi-hydrostatic pressure at 2.0 K is examined using a miniature Be-Cu high-pressure cell and a superconducting quantum interference device magnetometer. Under these conditions, Mn 1 2 Ac behaves as a single molecule magnet, and, as the pressure is increased, the stepped magnetization curve undergoes a gradual shape change. The most characteristic of these changes is an enhancement of the step in the zero field. From an analysis of the sweep-rate dependence of these changes, the zero-field change is attributed to a static effect, most likely a transition of Mn 1 2 Ac between Jahn-Teller isomers.