论文标题
应变驱动磁域的成像和SRRUO3外延薄膜中强的自旋偶联
Imaging of Strain Driven Magnetic Domains and Strong Spin-Phonon Coupling in Epitaxial Thin Films of SrRuO3
论文作者
论文摘要
使用脉冲激光沉积法生长具有大菌株障碍的SRRUO3的外延薄膜，在磁性测量中显示了两个不同的过渡温度。我们首次使用磁力显微镜在这些薄膜上使用磁力显微镜介绍了磁域的视觉演变。该研究清楚地表明，与两个过渡相对应的磁各向异性是不同的。据观察，垂直磁各向异性在膜中占主导地位，这会导致域旋转方向优选沿偏外方向。拉曼研究表明，该晶格受磁性阶的高度影响。对磁过渡周围的声子光谱的分析揭示了强旋形耦合的存在，并且计算导致SRRUO3在LSAT和SRTIO3单一晶体底物上生长的SRRUO3膜的λ〜5 cm-1和λ〜8.5 cm-1的自旋耦合强度（λ）值。
Epitaxial thin films of SrRuO3 with large strain disorder were grown using pulsed laser deposition method which showed two distinct transition temperatures in Magnetic measurements. For the first time, we present visual evolution of magnetic domains across the two transitions using Magnetic force microscopy on these films. The study clearly showed that the magnetic anisotropy corresponding to the two transitions is different. It is observed that the perpendicular magnetic anisotropy is dominating in films which results in domain spin orientation preferably in out of plane direction. The Raman studies showed that the lattice is highly influenced by the magnetic order. The analysis of the phonon spectra around magnetic transition reveals the existence of strong spin-phonon coupling and the calculations resulted in spin-phonon coupling strength (λ) values of λ ~ 5 cm-1 and λ ~ 8.5 cm-1, for SrRuO3 films grown on LSAT and SrTiO3 single crystal substrates, respectively.
