Structure and Physical Properties and Charge Ordering in La2-xSrxMnO4 (1.125 ≤ x ≤2.0)

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2004,（1）
• 页码范围: 187-190
• 页数: 4页
• 语种: 英文

摘要

Structural measurements have revealed nonlinear changes of lattice parameters in the layered-perovskite manganites La2-xSrxMnO4 with increasing Sr content; these changes can be well understood by means of interactions among the charge, crystal lattice and the orbital degree of freedom in this strongly correlated system. A probably spin-glass transition was detected for the first time in the x ＝ 1.75 sample at the temperature of around 44K.Fundamental properties of charge ordering appearing in the range of 1.5 ≤ x ≤ 1.75 have been observed at low-temperatures and are interpreted in terms of the Mn3+-dz2 orbital ordering.