Destruction of spin cycloid in (111)c-oriented BiFeO3 thin films by epitiaxial constraint:: Enhanced polarization and release of latent magnetization -: art. no. 032511
Destruction of spin cycloid in (111)c-oriented BiFeO3 thin films by epitiaxial constraint:: Enhanced polarization and release of latent magnetization -: art. no. 032511
复制标题
DOI：
10.1063/1.1851612
复制
发表时间：
2005-01-17
影响因子：
4
通讯作者：
Viehland, D
中科院分区：
文献类型：
--
作者：
Bai, FM;Wang, JL;Viehland, D
在BiFeO 3薄膜中，已经发现外延约束导致空间调制自旋结构的破坏。对于（111）c薄膜，相对于相应的块状晶体，它示出（i）在低外加场下的感生磁化增强;（ii）极化显著增强;而（iii）（111）（c）薄膜和晶体的晶格结构几乎相同。我们的研究结果表明，eptiaxial约束诱导摆线和均匀的反铁磁自旋状态之间的过渡，释放一个潜在的反铁磁成分锁定在摆线。(C)2005年美国物理学会。
In BiFeO3 films, it has been found that epitaxial constraint results in the destruction of a space modulated spin structure. For (111)c films, relative to corresponding bulk crystals, it is shown (i) that the induced magnetization is enhanced at low applied fields; (ii) that the polarization is dramatically enhanced; whereas, (iii) the lattice structure for (111)(c) films and crystals is nearly identical. Our results evidence that eptiaxial constraint induces a transition between cycloidal and homogeneous anti ferromagnetic spin states, releasing a latent antiferromagnetic component locked within the cycloid. (C) 2005 American Institute of Physics.