Phase diagrams of strained Ca1–xCexMnO3 films
Phase diagrams of strained Ca1–xCexMnO3 films
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DOI：
10.1063/1.4768198
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发表时间：
2012-12
影响因子：
3.2
通讯作者：
P. Xiang;Hiroyuki Yamada;H. Akoh;A. Sawa
中科院分区：
文献类型：
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作者：
P. Xiang;Hiroyuki Yamada;H. Akoh;A. Sawa
电子掺杂锰氧化物Ca 1 − xCexMnO 3（CCMO; 0 ≤ x ≤ 0.1）薄膜沉积在三种不同的单晶氧化物衬底上：YAlO 3，NdAlO 3和LaSrAlO 4，它们分别使薄膜受到压缩应变，实际晶格匹配和拉伸应变。从结晶度-温度曲线提取的活化能的温度依赖性清楚地表明在CCMO膜的相变。与磁化测量的比较表明，无论基板，温度驱动的相变的CCMO薄膜从G型反铁磁转变在x = 0的倾斜反铁磁转变和电荷和/或轨道有序的过渡，随着x的增加。在倾斜反铁磁相中，外延应变不仅对输运性质有重要影响，而且对自发磁化强度、磁化强度等磁性也有重要影响。
The transport and magnetic properties were examined of thin films of the electron-doped manganite Ca1−xCexMnO3 (CCMO; 0 ≤ x ≤ 0.1) deposited on three different single-crystalline oxide substrates: YAlO3, NdAlO3, and LaSrAlO4, which subject the films to a compressive strain, a practical lattice matching, and a tensile strain, respectively. The temperature dependence of the activation energy extracted from the resistivity–temperature curves clearly indicated the phase transitions in the CCMO films. A comparison with magnetization measurements revealed that regardless of the substrates, the temperature-driven phase transition of the CCMO films changed from the G-type antiferromagnetic transition at x = 0 to the canted antiferromagnetic transition and to the charge- and/or orbital-ordered transition, as x was increased. In the canted antiferromagnetic phase, the epitaxial strains have significant impact not only on the transport properties but also on the magnetic properties such as the spontaneous magnetizat...