Magnetic and structural transitions in La1−xSrxMnO3: T-x phase diagram
Magnetic and structural transitions in La1−xSrxMnO3: T-x phase diagram
复制标题
La1−xSrxMnO3 中的磁性和结构转变：T-x 相图
DOI：
10.1134/1.567873
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Balbashov
中科院分区：
文献类型：
--
作者：
A. Mukhin;V. Ivanov;V. Travkin;S. Lebedev;A. Pimenov;A. Loidl;A. Balbashov
研究了La 1 − xSrxMnO 3（0≤x≤ 0.45）单晶的电导率、磁化率、磁化强度、亚毫米波（v=5 <$20 cm−1）介电常数和动态电导率。这些量的温度依赖性的异常被确定与不同的磁性和结构相变，包括反铁磁和铁磁有序，强扭曲（Jahn-Teller）和弱扭曲（伪立方）的正交相之间的结构转变，结构转变为菱面体相和不寻常的过渡到极化子有序状态。结果，在温度T=4.2 1050 K和浓度x=0 - 0.45的宽范围内构建了系统La 1 - 2xSrxMnO 3的完整T-x相图。
The electrical conductivity, magnetic susceptibility, magnetization, and submillimeter (v=5∓20 cm−1) permittivity and dynamic conductivity of La1−xSrxMnO3 (0≤x≤ 0.45) single crystals are investigated. The anomalies in the temperature dependences of these quantities are identified with diverse magnetic and structural phase transformations, including antiferromagnetic and ferromagnetic ordering, structural transitions between strongly distorted (Jahn-Teller) and weakly distorted (pseudocubic) orthorhombic phases, structural transitions to a rhombohedral phase and unusual transitions to a polaron-ordering state. As a result, the complete T-x phase diagram of the system La1−2xSrxMnO3 is constructed in a wide interval of temperatures T=4.2∓1050 K and concentrations x=0−0.45.