Impact of ultrafast demagnetization process on magnetization reversal in &ITL&IT10 FePt revealed using double laser pulse excitation

被引：5

作者：

Shi, J. Y. ^{[1
,2
]}

Tang, M. ^{[3
,4
,5
]}

Zhang, Z. ^{[1
,2
]}

Ma, L. ^{[3
,4
,5
]}

Sun, L. ^{[6
,7
]}

Zhou, C. ^{[6
,7
]}

Hu, X. F. ^{[6
,7
]}

Zheng, Z. ^{[1
,2
]}

Shen, L. Q. ^{[1
,2
]}

Zhou, S. M. ^{[3
,4
,5
]}

Wu, Y. Z. ^{[6
,7
]}

Chen, L. Y. ^{[1
,2
]}

Zhao, H. B. ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Opt Sci & Engn, Shanghai Ultraprecis Opt Mfg Engn Res Ctr, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Opt Sci & Engn, Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China

[3] Tongji Univ, Shanghai Key Lab Special Artificial Microstruct M, Shanghai 200092, Peoples R China

[4] Tongji Univ, Pohl Inst Solid State Phys, Shanghai 200092, Peoples R China

[5] Tongji Univ, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China

[6] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[7] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 08期

基金：

中国国家自然科学基金;

关键词：

NANOPARTICLES; FIELD; SIZE;

D O I：

10.1063/1.5017148

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultrafast laser induced magnetization reversal in L1(0) FePt films with high perpendicular magnetic anisotropy was investigated using single- and double-pulse excitations. Single-pulse excitation beyond 10 mJ cm(-2) caused magnetization (M) reversal at the applied fields much smaller than the static coercivity of the films. For double-pulse excitation, both coercivity reduction and reversal percentage showed a rapid and large decrease with the increasing time interval (Delta t) of the two pulses in the range of 0-2 ps. In this At range, the maximum demagnetization (Delta M-p) was also strongly attenuated, whereas the integrated demagnetization signals over more than 10 ps, corresponding to the average lattice heat effect, showed little change. These results indicate that laser induced M reversal in FePt films critically relies on Delta M-P. Because Delta M-p is determined by spin temperature, which is higher than lattice temperature, utilizing an ultrafast laser instead of a continuous-wave laser in laser-assisted M reversal may reduce the overall deposited energy and increase the speed of recording. The effective control of M reversal by slightly tuning the time delay of two laser pulses may also be useful for ultrafast spin manipulation. (C) 2018 Author(s).

引用

页数：5

共 37 条

[1]

Alloyeau D, 2009, NAT MATER, V8, P940, DOI [10.1038/NMAT2574, 10.1038/nmat2574]

[2] Nonthermal Photocoercivity Effect in a Low-Doped (Ga,Mn)As Ferromagnetic Semiconductor [J].

Astakhov, G. V. ;

Hoffmann, H. ;

Korenev, V. L. ;

Kiessling, T. ;

Schwittek, J. ;

Schott, G. M. ;

Gould, C. ;

Ossau, W. ;

Brunner, K. ;

Molenkamp, L. W. .

PHYSICAL REVIEW LETTERS, 2009, 102 (18)

[3] Ultrafast spin dynamics in ferromagnetic nickel [J].

Beaurepaire, E ;

Merle, JC ;

Daunois, A ;

Bigot, JY .

PHYSICAL REVIEW LETTERS, 1996, 76 (22) :4250-4253

[4] Dynamics of electron-magnon interaction and ultrafast demagnetization in thin iron films [J].

Carpene, E. ;

Mancini, E. ;

Dallera, C. ;

Brenna, M. ;

Puppin, E. ;

De Silvestri, S. .

PHYSICAL REVIEW B, 2008, 78 (17)

[5] Measurement of the nucleation and domain depinning field in a single Co/Pt multilayer dot by Anomalous Hall effect [J].

Delalande, M. ;

de Vries, J. ;

Abelmann, L. ;

Lodder, J. C. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2012, 324 (07) :1277-1280

[6] Thermally Assisted Magnetic Recording at 4 Tbit/in2 [J].

Greaves, Simon John ;

Kanai, Yasushi ;

Muraoka, Hiroaki .

IEEE TRANSACTIONS ON MAGNETICS, 2013, 49 (06) :2665-2670

[7] Quadratic Scaling of Intrinsic Gilbert Damping with Spin-Orbital Coupling in L10 FePdPt Films: Experiments and Ab Initio Calculations [J].

He, P. ;

Ma, X. ;

Zhang, J. W. ;

Zhao, H. B. ;

Luepke, G. ;

Shi, Z. ;

Zhou, S. M. .

PHYSICAL REVIEW LETTERS, 2013, 110 (07)

[8] Roadmap for Emerging Materials for Spintronic Device Applications [J].

Hirohata, Atsufumi ;

Sukegawa, Hiroaki ;

Yanagihara, Hideto ;

Zutic, Igor ;

Seki, Takeshi ;

Mizukami, Shigemi ;

Swaminathan, Raja .

IEEE TRANSACTIONS ON MAGNETICS, 2015, 51 (10)

[9] Structural dynamics during laser-induced ultrafast demagnetization [J].

Jal, Emmanuelle ;

Lopez-Flores, Victor ;

Pontius, Niko ;

Ferte, Tom ;

Bergeard, Nicolas ;

Boeglin, Christine ;

Vodungbo, Boris ;

Luning, Jan ;

Jaouen, Nicolas .

PHYSICAL REVIEW B, 2017, 95 (18)

[10] High Density Heat-Assisted Magnetic Recording Media and Advanced Characterization-Progress and Challenges [J].

Ju, Ganping ;

Peng, Yingguo ;

Chang, Eric K. C. ;

Ding, Yinfeng ;

Wu, Alexander Q. ;

Zhu, Xiaobin ;

Kubota, Yukiko ;

Klemmer, Timothy J. ;

Amini, Hassib ;

Gao, Li ;

Fan, Zhaohui ;

Rausch, Tim ;

Subedi, Pradeep ;

Ma, Minjie ;

Kalarickal, Sangita ;

Rea, Chris J. ;

Dimitrov, Dimitar V. ;

Huang, Pin-Wei ;

Wang, Kangkang ;

Chen, Xi ;

Peng, Chubing ;

Chen, Weibin ;

Dykes, John W. ;

Seigler, Mike A. ;

Gage, Edward C. ;

Chantrell, Roy ;

Thiele, Jan-Ulrich .

IEEE TRANSACTIONS ON MAGNETICS, 2015, 51 (11)

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