Monitoring laser-induced magnetization in FeRh by transient terahertz emission spectroscopy

被引：11

作者：

Awari, N. ^{[1
]}

Semisalova, A. ^{[2
,3
,4
]}

Deinert, J-C ^{[1
]}

Lenz, K. ^{[4
]}

Lindner, J. ^{[4
]}

Fullerton, E. ^{[5
]}

Uhlir, V ^{[5
,6
]}

Li, J. ^{[7
]}

Clemens, B. ^{[7
]}

Carley, R. ^{[8
]}

Scherz, A. ^{[8
]}

Kovalev, S. ^{[1
]}

Gensch, M. ^{[1
,9
,10
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Inst Radiat Phys, D-01328 Dresden, Germany

[2] Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany

[3] Univ Duisburg Essen, CENIDE, D-47057 Duisburg, Germany

[4] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany

[5] Univ Calif San Diego, Ctr Memory & Recording Res, La Jolla, CA 92093 USA

[6] Brno Univ Technol, CEITEC BUT, Purkynova 123, Brno 61200, Czech Republic

[7] Stanford Univ, Mat Sci & Engn, Stanford, CA 94305 USA

[8] European Xray Free Electron Laser Facil, Holzkoppel 4, D-22869 Schenefeld, Germany

[9] DLR Inst Opt Sensor Syst, Rutherfordstr 2, D-12489 Berlin, Germany

[10] Tech Univ Berlin, Inst Opt & Atomare Phys, Str 17 Juni 135, D-10623 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2020年 / 117卷 / 12期

基金：

欧盟地平线“2020”;

关键词：

SPIN DYNAMICS; ULTRAFAST; FILMS;

D O I：

10.1063/5.0019663

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, a conceptually different approach for investigating magnetic phase transitions in ultra-thin films is presented. THz emission from a laser-excited material is used to monitor the magnetization dynamics during the laser-driven antiferromagnetic to ferromagnetic transition in FeRh. The emitted THz signal is calibrated against static magnetometry data measurements, giving a direct measure of the absolute magnetic moment of the sample on the sub-picosecond timescale. The technique is, therefore, highly complementary to conventional time-resolved experiments such as time resolved magneto-optic Kerr effect (MOKE) or x-ray magnetic circular dichroism. (C) 2020 Author(s).

引用

页数：6

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