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首页> 外文会议>8th European Magnetic Materials and Applications Conference, Jun 7-10, 2000, Kyiv, Ukraine >Magnetic Microstructure of CMR La_(0.7)Sr_(0.3)MnO_3 Thin Films Grown on (001)LaAlO_3 Substrates Studied by X-Ray Diffraction and Magnetic Force Microscopy
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Magnetic Microstructure of CMR La_(0.7)Sr_(0.3)MnO_3 Thin Films Grown on (001)LaAlO_3 Substrates Studied by X-Ray Diffraction and Magnetic Force Microscopy

机译：X射线衍射和磁力显微镜研究（001）LaAlO_3衬底上生长的CMR La_（0.7）Sr_（0.3）MnO_3薄膜的磁微结构

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摘要

Colossal Magnetoresistive (CMR) La_(0.7)Sr_(0.3)MnO_3 (LSMO) thin films have been deposited by laser ablation on pseudo-cubic LaAlO_3 (001) substrates. The ferromagnetic state of these films at room temperature has been evidenced by SQUID measurements. Depending on the growth conditions (mostly the synthesis temperature), out-of-plane parameters varying from of 3.919 A or 4.002 A are measured on the X-Ray diffraction (XRD) patterns. Using Magnetic Force Microscopy (MFM), black and white contrasts characteristics of films with an out-of-plane magnetization are imaged. However, depending on the out-of-plane parameter, two out-of-plane magnetic patterns are showed. On samples with the out-of-plane parameter of 3.919 A, a " maze-like - bubble " pattern is imaged while on samples with a larger out-of-plane value of 4.002 A, large domains with a diameter of about 5μm are evidenced. We conclude that the magnetic microstructure of LSMO films deposited on LaAlO_3 substrates is strongly influenced by the growth conditions and that the magnetic domains shape can be correlate to the out-of-plane parameter of the film.
机译：巨大的磁阻（CMR）La_（0.7）Sr_（0.3）MnO_3（LSMO）薄膜已通过激光烧蚀沉积在伪立方LaAlO_3（001）衬底上。这些薄膜在室温下的铁磁状态已通过SQUID测量证明。根据生长条件（主要是合成温度），在X射线衍射（XRD）图案上测量的平面外参数范围为3.919 A或4.002A。使用磁力显微镜（MFM），可以对具有平面外磁化强度的胶片的黑白对比特性进行成像。但是，根据平面外参数，显示了两个平面外磁模式。在平面外参数为3.919 A的样本上，会成像“迷宫状气泡”图案，而在平面外值为4.002 A的样本上，直径约5μm的大区域证明。我们得出的结论是，沉积在LaAlO_3衬底上的LSMO薄膜的磁性微观结构受生长条件的强烈影响，并且磁畴的形状可以与薄膜的平面外参数相关。

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