CAJ | 학술논문

用超高真空蒸发技术在GaAs(100)和玻璃衬底上生长不同厚度Mn/Sb多层膜,并经短时间热退火(～1,20min).磁化强度测量显示具有很强的室温铁磁特性.当多层膜厚度从700A增至1600A时,饱和强度增加了近一倍,极向和纵向克尔角也增加了,但不到一倍.这表明磁化强度和克尔角两者均依赖于多层摸的厚度,但不是简单的正比于厚度的关系.增加Mn/Sb多层膜的厚度能增强饱和磁化强度和极向和纵向克尔饱和角.X射线衍射谱图结果表明高质量单晶结构的Mn/Sb多层膜能用超高真空蒸发技术生长,对较厚的多层薄膜,热退火的时间可很短(约1min).
용초고진공증발기술재GaAs(100)화파리츤저상생장불동후도Mn/Sb다층막,병경단시간열퇴화(～1,20min).자화강도측량현시구유흔강적실온철자특성.당다층막후도종700A증지1600A시,포화강도증가료근일배,겁향화종향극이각야증가료,단불도일배.저표명자화강도화극이각량자균의뢰우다층모적후도,단불시간단적정비우후도적관계.증가Mn/Sb다층막적후도능증강포화자화강도화겁향화종향극이포화각.X사선연사보도결과표명고질량단정결구적Mn/Sb다층막능용초고진공증발기술생장,대교후적다층박막,열퇴화적시간가흔단(약1min).
Mn/Sb multilayer films with different thicknesses were grown on GaAs(100) and glass by ultrahigh vacuum(UHV) evaporation technique and then annealing for a short duration(1 or 20 min). Magnetization measurements revealed strong room temperature ferromagnetism. And when the thickness of layers was increased from 700 to 1600,the saturation magnetization increased nearly double; and the polar and longitudinal Kerr saturation angles θk increased too, but less than two times. It indicates that both the magnetization and Kerr rotation angle depend on the thickness of layers, but are not simply proportional to the thickness of the layers. The saturation magnetization and both the polar and longitudinal Kerr saturation angles can be enhanced with increasing the thickness of the layers. X ray diffraction(XRD) pattern results show that high quality crystal structures of thicker Mn/Sb films can be fabricated by UHV evaporation technique with subsequent thermal annealing for a very short duration(about 1 min).