Spin wave resonance in Ga1-xMnxAs

被引：83

作者：

Goennenwein, STB

Graf, T

Wassner, T

Brandt, MS

Stutzmann, M

Philipp, JB

Gross, R

Krieger, M

Zürn, K

Ziemann, P

Koeder, A

Frank, S

Schoch, W

Waag, A

机构：

[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

[2] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

[3] Univ Ulm, Abt Festkorperphys, D-89069 Ulm, Germany

[4] Univ Ulm, Abt Halbleiterphys, D-89069 Ulm, Germany

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 05期

关键词：

D O I：

10.1063/1.1539550

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report ferromagnetic resonance experiments on Ga1-xMnxAs thin films. For the dc magnetic field perpendicular to the sample plane, we observe up to eight distinct resonances, which we attribute to spin wave modes. To account for the spacing of the resonances, we infer a linear gradient in the magnetic properties, which is ascribed to a linear variation of the uniaxial magnetic anisotropy with film thickness. Values of D=(1+/-0.4)x10(-9) Oe cm(2) for the spin stiffness and J(MnMn)approximate to1 meV for the exchange integral between Mn spins are obtained. (C) 2003 American Institute of Physics.

引用

页码：730 / 732

页数：3

共 23 条

[1] Ferromagnetism and its stability in the diluted magnetic semiconductor (In,Mn)As [J].