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首页> 外文期刊>Japanese journal of applied physics >Perpendicular magnetic anisotropy and its electric field effect in Co ultrathin films deposited directly on SrTiO_3(111) surface
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Perpendicular magnetic anisotropy and its electric field effect in Co ultrathin films deposited directly on SrTiO_3(111) surface

机译：直接沉积在SrTiO_3（111）表面的Co超薄膜中的垂直磁各向异性及其电场效应

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摘要

We have investigated magnetic anisotropy and its electric field effect in ultrathin Co with a Pt cap layer. The layers were directly deposited on SrTiO3(111) and (100) surfaces without any under layer. In as-deposited samples, a stronger perpendicular magnetic anisotropy was observed in the (111) sample. A back gate configuration was used to apply the electric field to the bottom surface of Co layer through the SrTiO3 substrate. In both samples, the coercivity was enhanced with a positive gate bias, which corresponds to the direction of the electron accumulation. The efficiency of the change in the coercivity per modulated electron density was greater in the (111) sample over a wide temperature range including 2K, at which the thermally activated magnetization reversal was expected to be suppressed. The results suggest that the surface orientation of the substrate affects both the magnetic anisotropy and its electric field effect on Co. (C) 2018 The Japan Society of Applied Physics
机译：我们已经研究了具有Pt盖层的超薄Co中的磁各向异性及其电场效应。该层直接沉积在SrTiO3（111）和（100）表面上，没有任何底层。在沉积的样品中，在（111）样品中观察到较强的垂直磁各向异性。使用背栅配置通过SrTiO3衬底将电场施加到Co层的底表面。在这两个样品中，矫顽力都随着正的栅极偏压而增强，该偏压对应于电子积累的方向。在（111）样品中，在包括2K的较宽温度范围内，单位调制电子密度的矫顽力变化的效率更高，在该温度范围上，预期可抑制热活化磁化反转。结果表明，基板的表面取向会影响磁各向异性及其对Co的电场效应。（C）2018日本应用物理学会

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