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首页> 外文会议>Symposium on Epitaxial Oxide Thin Films III March 31-April 2, 1997, San Francisco, California,U.S.A >Reactive growth and properties of epitaxial Fe-Mg-O spinel films on (001)MgO
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Reactive growth and properties of epitaxial Fe-Mg-O spinel films on (001)MgO

机译：（001）MgO上外延Fe-Mg-O尖晶石薄膜的反应生长和性能

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Epitaxial Mg-Fe-O spinel thinfilms were prepared by prepared by solid state reactions between MgO(100) substrates and thin films or vapors of iron oxide.Iron or iron oxide was deposited by electron beam evaporation in an oxygen backgound pressure onto a heated MgO crystal. The formation of MgFe_2O_4 at high temperatures proceeds via cation counter-diffusion in the fixed oxygen sublattice. Depending on substrate temperature, oxygen partial pressure and target mateiral, epitaxial spinel films of different composition and magnetic properties were obtained. Crystal structure, composition and sub-micron morphology were investigated by RBS, XRD, tem/saed AND edx, magnetic hysteresis loops were recorded at room temperature using the magneto-optic Kerr effect. Thickness interference fringes observed by XRD confirm the growth of smooth films. The main feature found in TEM plane view samples is a network of cation antiphase boundaries. The film composition measured by RBS varied from Fe_2+ epsilon O_3 films deposited at 340 deg C substrate temperature to a solid solution of Fe_2+ epsilon O_3 and MgFe_2O_4 at 500 deg C to MgFe_2O_4 above 800 deg C. EDX line-scans show a single phase MgFe_2O_4 spinel for a substrate temperature of 850 deg C, without variation of composition with position or depth. At substrate temperatures higher than 800 deg C Fe~2+ was additionally dissolved in the MgO substrate, forming a Fe_xMg_1-xO solid solution.
机译：外延Mg-Fe-O尖晶石薄膜是通过MgO（100）衬底与氧化铁薄膜或蒸气之间的固相反应制备的，在氧气背压下通过电子束蒸发将铁或氧化铁沉积在加热的MgO上水晶。 MgFe_2O_4在高温下的形成是通过阳离子反扩散在固定氧亚晶格中进行的。取决于衬底温度，氧分压和目标材料，具有不同组成和磁性能的外延尖晶石膜。通过RBS，XRD，tem / saed AND edx研究晶体结构，组成和亚微米形态，并在室温下利用磁光克尔效应记录磁滞回线。 XRD观察到的厚度干涉条纹证实了平滑膜的生长。在TEM平面视图样本中发现的主要特征是阳离子反相边界的网络。通过RBS测量的膜组成从在340摄氏度的基底温度下沉积的Fe_2 +εO_3膜到在500摄氏度下的Fe_2 +εO_3和MgFe_2O_4的固溶体到800摄氏度以上的MgFe_2O_4。EDX线扫描显示单相MgFe_2O_4尖晶石基板温度为850摄氏度时，成分不会随位置或深度而变化。在高于800摄氏度的衬底温度下，Fe〜2 +进一步溶解在MgO衬底中，形成Fe_xMg_1-xO固溶体。

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