Optically induced Fe magnetization reversal in Fe/MnAs/GaAs(001)

被引：0
|
作者：
Spezzani, C. [1 ,2 ]
Ferrari, E. [1 ,3 ]
Allaria, E. [1 ]
Vidal, F. [4 ]
Lounis, L. [4 ]
Ciavardini, A. [5 ]
Delaunay, R. [6 ]
Capotondi, F. [1 ]
Pedersoli, E. [1 ]
Coreno, M. [1 ]
Svetina, C. [1 ]
Raimondi, L. [1 ]
Zangrando, M. [1 ]
Ivanov, R. [1 ]
Nikolov, I. [1 ]
Demidovich, A. [1 ]
Danailov, M. [1 ]
De Ninno, G. [1 ,7 ]
Popescu, H. [8 ]
Eddrief, M. [4 ]
Kiskinova, M. [1 ]
Sacchi, M. [4 ,8 ]
机构：
[1] ELETTRA Sincrotrone Trieste, Trieste, Italy
[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France
[3] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy
[4] UPMC, Inst NanoSci Paris, Paris, France
[5] CNR ISM, Rome, Italy
[6] UPMC, LCPMR, Paris, France
[7] Univ Nova Gorica, Lab Quantum Opt, Nova Gorica, Slovenia
[8] Synchrotron SOLEIL, St Aubin, France
来源：
ADVANCES IN X-RAY FREE-ELECTRON LASERS INSTRUMENTATION III | 2015年 / 9512卷
关键词：
Magnetic materials; thermally induced magnetization switching; magnetization and structural dynamics;
D O I：
10.1117/12.2184710
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Magnetization control without applying magnetic fields has potential for applications in sensors and devices. In Fe/MnAs/GaAs(001), the Fe magnetization can be modified by acting on the MnAs microstructure via temperature control, without applying external magnetic fields. Here we use an optical laser pulse to vary the local temperature and an x-ray free-electron laser pulse to probe the induced magnetic and structural dynamics in a time-resolved resonant scattering experiment, both pulses having similar to 100 fs duration. Modifications of the MnAs microstructure take place within a few ps, followed by a slower dynamics driven by thermal diffusion. We show that a single optical laser pulse can reverse the Fe magnetization locally, the process being driven not by the fast modifications of the MnAs structure, but rather by its slower return to equilibrium.
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页数：5
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