Correlation between Ferromagnetic Layer Easy Axis and the Tilt Angle of Self Assembled Chiral Molecules.
Correlation between Ferromagnetic Layer Easy Axis and the Tilt Angle of Self Assembled Chiral Molecules.
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DOI：
10.3390/molecules25246036
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发表时间：
2020-12-20
期刊：
影响因子：
--
通讯作者：
Paltiel Y
中科院分区：
文献类型：
--
作者：
Sukenik N;Tassinari F;Yochelis S;Millo O;Baczewski LT;Paltiel Y
研究发现，手性分子与铁磁金属之间的自旋-自旋相互作用强烈地受到手性诱导自旋选择性效应的影响。以前的工作揭示了两个互补的现象：磁性薄膜吸附手性分子后的磁化重取向和相反的对映体与磁性基底的不同相互作用速率。这些现象都是在铁磁体的易磁化轴偏离平面时观察到的。在这项工作中，铁磁易轴方向的影响，手性分子单层的倾斜角和磁性基板的磁化重取向，使用磁力显微镜进行了研究。我们还研究了在吸附过程中施加的外部磁场的影响。我们的结果表明，铁磁层的易轴方向和键合分子的倾斜角之间有明确的相关性。发现该倾斜角对于平面内易轴比平面外易轴更大。外磁场下的吸附表明，磁化重取向发生后，吸附事件。这些发现表明，手性分子和铁磁层之间的相互作用稳定的磁性重取向，即使在吸附后，强烈依赖于磁性基板的各向异性。这种独特的行为对于开发使用磁性基质的对映体分离技术是重要的。
The spin–spin interactions between chiral molecules and ferromagnetic metals were found to be strongly affected by the chiral induced spin selectivity effect. Previous works unraveled two complementary phenomena: magnetization reorientation of ferromagnetic thin film upon adsorption of chiral molecules and different interaction rate of opposite enantiomers with a magnetic substrate. These phenomena were all observed when the easy axis of the ferromagnet was out of plane. In this work, the effects of the ferromagnetic easy axis direction, on both the chiral molecular monolayer tilt angle and the magnetization reorientation of the magnetic substrate, are studied using magnetic force microscopy. We have also studied the effect of an applied external magnetic field during the adsorption process. Our results show a clear correlation between the ferromagnetic layer easy axis direction and the tilt angle of the bonded molecules. This tilt angle was found to be larger for an in plane easy axis as compared to an out of plane easy axis. Adsorption under external magnetic field shows that magnetization reorientation occurs also after the adsorption event. These findings show that the interaction between chiral molecules and ferromagnetic layers stabilizes the magnetic reorientation, even after the adsorption, and strongly depends on the anisotropy of the magnetic substrate. This unique behavior is important for developing enantiomer separation techniques using magnetic substrates.
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影响因子：
16.6
作者：
Ben Dor O;Yochelis S;Radko A;Vankayala K;Capua E;Capua A;Yang SH;Baczewski LT;Parkin SS;Naaman R;Paltiel Y
通讯作者：
Paltiel Y
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作者：
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影响因子：
56.9
作者：
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通讯作者：
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