Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching

Quessab Y.; Deb M.; Gorchon J.; Hehn M.; Malinowski G.; Mangin And S.

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Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching

机译：解决了磁性圆二色性在多次照度相关的全光切换中的作用

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By conducting helicity-dependent ultrafast magnetization dynamics in a CoTb ferrimagnetic alloy, we are able to quantitatively determine the magnetic circular dichroism (MCD) and resolve its role in the helicity-dependent all-optical switching (AOS). Unequivocal interpretation of the sign of the dichroism is provided by performing AOS and femtosecond laser-induced domain wall motion experiments. We demonstrate that AOS occurs when the magnetization is initially in the most absorbent state, according to the light helicity. Moreover, we evidence that the MCD creates a thermal gradient that drives a domain wall toward hotter regions. Our experimental results are in agreement with the purely thermal models of AOS.

机译：通过在CoTb亚铁磁性合金中进行依赖于螺旋度的超快磁化动力学，我们能够定量确定磁性圆二色性（MCD）并解决其在依赖于螺旋度的全光开关（AOS）中的作用。通过执行AOS和飞秒激光诱导的畴壁运动实验，可以明确解释二色性的迹象。我们证明，根据光螺旋度，当磁化最初处于最吸收状态时会发生AOS。此外，我们证明MCD会产生热梯度，从而将畴壁驱动到更热的区域。我们的实验结果与AOS的纯热模型一致。

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《Physical review》 |2019年第2期|024425.1-024425.5|共5页
作者
Quessab Y.; Deb M.; Gorchon J.; Hehn M.; Malinowski G.; Mangin And S.;
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Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France|NYU, Ctr Quantum Phenomena, Dept Phys, New York, NY 10003 USA;

Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France|Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany;

Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France;

Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France;

Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France;

Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54011 Nancy, France;

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1. Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching [J] . Quessab Y., Deb M., Gorchon J., Physical review . 2019,第2期

机译：解决磁圆形二中间的作用在多仪螺旋依赖性的全光开关中的作用
2. Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching [J] . Quessab Y., Deb M., Gorchon J., Physical review, B . 2019,第2期

机译：解决磁圆形二中间的作用在多仪螺旋依赖性的全光开关中的作用
3. All-optical switching in granular ferromagnets caused by magnetic circular dichroism [J] . Matthew O. A. Ellis, Eric E. Fullerton, Roy W. Chantrell Scientific reports. . 2016,第1期

机译：引起的磁圆二色性粒状铁磁体全光开关
4. Contribution of magnetic circular dichroism in all-optical light helicity-dependent magnetic switching [C] . A. Tsukamoto, S. Kogure, H. Yoshikawa, International Conference Ultrafast Magnetization Conference . 2015

机译：磁性圆形二中间的贡献在所有光学灯螺旋型磁力开关中
5. Helicity-dependent all-optical switching in hybrid metal-ferromagnet structures for ultrafast magnetic data storage. [D] . Cheng, Feng. 2016

机译：混合金属-铁磁体结构中依赖于螺旋度的全光开关，用于超快速磁数据存储。
6. All-optical switching in granular ferromagnets caused by magnetic circular dichroism [O] . Matthew O. A. Ellis, Eric E. Fullerton, Roy W. Chantrell -1

机译：磁性圆二色性导致的颗粒铁磁体中的全光切换
7. All-optical switching in granular ferromagnets caused by magnetic circular dichroism [O] . Ellis Matthew O A, Fullerton Eric E., Chantrell Roy W. 2016

机译：磁圆二色性引起的粒状铁磁体全光转换
8. Effects of symmetry on circular and linear magnetic dichroism in angle-resolved photoemission spectra of Gd/Y (0001) and Fe-Ni//Cu (001) [R] . Goodman, K. W. , Tobin, J. G. , Schumann, F. O. , 1997

机译：对称性对Gd / Y（0001）和Fe-Ni // Cu（001）角分辨光电子能谱中圆和线性二向色性的影响

Resolving the role of magnetic circular dichroism in multishot helicity-dependent all-optical switching

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