Photoinduced Nonthermal Reduction of the Coercive Field in FePt and FePt0.84Rh0.16 Epitaxial Thin Films in the L10 Phase

被引：0
|
作者：
Petrov, A. V. [1 ]
Nikitin, S. I. [1 ]
Tagirov, L. R. [1 ,2 ]
Kamzin, A. S. [3 ]
Yusupov, R. V. [1 ]
机构：
[1] Kazan Fed Univ, Kazan 420008, Russia
[2] Russian Acad Sci, FRC Kazan Sci Ctr, Zavoisky Phys Tech Inst, Kazan 420029, Russia
[3] Ioffe Inst, St Petersburg 194021, Russia
来源：
JETP LETTERS | 2023年 / 118卷 / 02期
关键词：
MAGNETIC-PROPERTIES;
D O I：
10.1134/S0021364023601914
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The time-resolved magneto-optical Kerr effect in epitaxial thin films of the FePt compound and the FePt0.84Rh0.16 solid solution with the perpendicular magnetic anisotropy on MgO (001) substrates has been studied. The evolution of hysteresis loops at short (100 fs-1 ns) and long (1-20 ms) time scales after the excitation by a femtosecond light pulse has been studied. Long-lived nonthermal reduction of the coercive field has been detected. The coercive field is recovered in several milliseconds. It has been proposed to explain the observed phenomenon by the excitation of high-Q-factor acoustic resonances in the substrate/film system and to the strong magnetoelastic interaction in FePt and FePt0.84Rh0.16 films.
引用
收藏
页码：117 / 122
页数：6
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