Shape Dependence of Low-Temperature Magnetic Relaxation of Mn12Ac

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2008,（7）
• 页码范围: 2631-2633
• 页数: 3页
• 语种: 英文

摘要

We report the discovery that the low-temperature magnetic relaxation in Mn,12 Ac single crystals strongly depends on the shape of the samples. The relaxation time exhibits a minimum at the phase transition point between ferromagnetic and antiferromagnetic phases. The shape dependence is attributed to the dipolar interaction between molecular magnets.