Coherent Magnetization Precession in Ferromagnetic (Ga,Mn) As Induced by Picosecond Acoustic Pulses

被引：177

作者：

Scherbakov, A. V. ^{[1
]}

Salasyuk, A. S. ^{[1
,2
]}

Akimov, A. V. ^{[1
,3
]}

Liu, X. ^{[4
]}

Bombeck, M. ^{[2
]}

Brueggemann, C. ^{[2
]}

Yakovlev, D. R. ^{[1
,2
]}

Sapega, V. F. ^{[1
]}

Furdyna, J. K. ^{[4
]}

Bayer, M. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Tech Univ, D-44227 Dortmund, Germany

[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[4] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 11期

基金：

美国国家科学基金会; 俄罗斯基础研究基金会;

关键词：

DOMAIN-STRUCTURE; GA1-XMNXAS; ANISOTROPY; ULTRASONICS; FILMS;

D O I：

10.1103/PhysRevLett.105.117204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the magnetization of a thin ferromagnetic (Ga,Mn) As layer can be modulated by picosecond acoustic pulses. In this approach a picosecond strain pulse injected into the structure induces a tilt of the magnetization vector M, followed by the precession of M around its equilibrium orientation. This effect can be understood in terms of changes in magnetocrystalline anisotropy induced by the pulse. A model where only one anisotropy constant is affected by the strain pulse provides a good description of the observed time-dependent response.

引用

页数：4

共 24 条

[1] Observation of terahertz radiation coherently generated by acoustic waves [J].

Armstrong, Michael R. ;

Reed, Evan J. ;

Kim, Ki-Yong ;

Glownia, James H. ;

Howard, William M. ;

Piner, Edwin L. ;

Roberts, John C. .

NATURE PHYSICS, 2009, 5 (04) :285-288

[2] Magnetization manipulation in (Ga,Mn)As by subpicosecond optical excitation [J].

Astakhov, GV ;

Kimel, AV ;

Schott, GM ;

Tsvetkov, AA ;

Kirilyuk, A ;

Yakovlev, DR ;

Karczewski, G ;

Ossau, I ;

Schmidt, G ;

Molenkamp, LW ;

Rasing, T .

APPLIED PHYSICS LETTERS, 2005, 86 (15) :1-3

[3] Ga1-xMnxAs/piezoelectric actuator hybrids:: A model system for magnetoelastic magnetization manipulation [J].

Bihler, C. ;

Althammer, M. ;

Brandlmaier, A. ;

Gepraegs, S. ;

Weiler, M. ;

Opel, M. ;

Schoch, W. ;

Limmer, W. ;

Gross, R. ;

Brandt, M. S. ;

Goennenwein, S. T. B. .

PHYSICAL REVIEW B, 2008, 78 (04)

[4] Magnetization vector manipulation by electric fields [J].

Chiba, D. ;

Sawicki, M. ;

Nishitani, Y. ;

Nakatani, Y. ;

Matsukura, F. ;

Ohno, H. .

NATURE, 2008, 455 (7212) :515-518

[5] The effect of carrier density on magnetic anisotropy of the ferromagnetic semiconductor (Ga, Mn)As [J].

Chung, Sunjae ;

Kim, H. C. ;

Lee, Sanghoon ;

Liu, X. ;

Furdyna, J. K. .

SOLID STATE COMMUNICATIONS, 2009, 149 (41-42) :1739-1742

[6] Magnetic anisotropy in (Ga,Mn)As: Influence of epitaxial strain and hole concentration [J].

Glunk, M. ;

Daeubler, J. ;

Dreher, L. ;

Schwaiger, S. ;

Schoch, W. ;

Sauer, R. ;

Limmer, W. ;

Brandlmaier, A. ;

Goennenwein, S. T. B. ;

Bihler, C. ;

Brandt, M. S. .

PHYSICAL REVIEW B, 2009, 79 (19)

[7] Dispersion of the long-wavelength phonons in Ge, Si, GaAs, quartz, and sapphire [J].

Hao, HY ;

Maris, HJ .

PHYSICAL REVIEW B, 2001, 63 (22)

[8] Photoinduced precession of magnetization in ferromagnetic (Ga,Mn)As [J].

Hashimoto, Y. ;

Kobayashi, S. ;

Munekata, H. .

PHYSICAL REVIEW LETTERS, 2008, 100 (06)

[9]

Lang R, 2005, PHYS REV B, V72, DOI [10.1103/PhysRevB.72.024430, 10.1103/PhysRevB.024430]

[10] Ferromagnetic resonance in Ga1-xMnxAs:: Effects of magnetic anisotropy -: art. no. 205204 [J].

Liu, X ;

Sasaki, Y ;

Furdyna, JK .

PHYSICAL REVIEW B, 2003, 67 (20)

← 1 2 3 →