Photo-induced anomalous Hall effect in GaAs:MnAs granular films

被引：6

作者：

Ogawa, T

Shuto, Y

Ueda, K

Tanaka, M

机构：

[1] Japan Sci & Technol Corp, PRESTO, Kawaguchi, Saitama 3320012, Japan

[2] Univ Tokyo, Dept Elect Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2004年 / 21卷 / 2-4期

关键词：

GaAs; MnAs; granular film; photo-induced anomalous Hall effect;

D O I：

10.1016/j.physe.2003.11.167

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated the temperature-dependent Hall resistance and magnetization of the semiconductor/ferromagnetic hybrid structure of GaAs:MnAs granular films under dark and laser irradiated conditions. Under the laser irradiation with the energy above the band gap energy of GaAs, negative large Hall resistance due to the anomalous Hall effect was observed below the blocking temperature T-b of the MnAs clusters. The intrinsic photo-induced magnetization of the MnAs clusters was, however, hardly observed. These results indicate that the blocking phenomena correlate with the photo-induced anomalous Hall resistance of the GaAs:MnAs granular films. Therefore, the magnetic interaction between the photo-induced carriers and the blocked magnetization of the MnAs clusters plays an important role in the photo-induced phenomena in the GaAs:MnAs granular films. (C) 2003 Elsevier B.V. All rights reserved.

引用

收藏

页码：1041 / 1045

页数：5

相关论文

共 11 条

[1] Negative magnetoresistance in GaAs with magnetic MnAs nanoclusters [J].

Akinaga, H ;

De Boeck, J ;

Borghs, G ;

Miyanishi, S ;

Asamitsu, A ;

Van Roy, W ;

Tomioka, Y ;

Kuo, LH .

APPLIED PHYSICS LETTERS, 1998, 72 (25) :3368-3370

[2] Thermoremanence and zero-field-cooled/field-cooled magnetization study of Cox(SiO2)1-x granular films -: art. no. 064422 [J].

Denardin, JC ;

Brandl, AL ;

Knobel, M ;

Panissod, P ;

Pakhomov, AB ;

Liu, H ;

Zhang, XX .

PHYSICAL REVIEW B, 2002, 65 (06) :1-8

[3] Fe-based magnetic-semiconductor hybrid structures for photocarrier-induced magnetism [J].

Haneda, S ;

Munekata, H ;

Takatani, Y ;

Koshihara, S .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :6445-6447

[4] Formation of FeAs and Fe crystallites in GaAs-Fe composite structures and their roles in light-enhanced magnetization [J].

Haneda, S ;

Koshihara, S ;

Munekata, H .

PHYSICA E, 2001, 10 (1-3) :437-441

[5] NONLINEAR TEMPERATURE-VARIATION OF MAGNETIC VISCOSITY IN NANOSCALE FEOOH PARTICLES [J].

IBRAHIM, MM ;

DARWISH, S ;

SEEHRA, MS .

PHYSICAL REVIEW B, 1995, 51 (05) :2955-2959

[6] Magnetic response of Cd0.63Mn0.37Te under illumination:: Dynamic behavior of spin glass with step-like heating and cooling [J].

Kawai, H ;

Sato, T .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (10) :7310-7315

[7] Blocking and freezing of magnetic moments for iron nitride fine particle systems [J].

Mamiya, H ;

Nakatani, I ;

Furubayashi, T .

PHYSICAL REVIEW LETTERS, 1998, 80 (01) :177-180

[8] Effect of optical spin injection on ferromagnetically coupled Mn spins in the III-V magnetic alloy semiconductor (Ga, Mn)As [J].

Oiwa, A ;

Mitsumori, Y ;

Moriya, R ;

Slupinski, T ;

Munekata, H .

PHYSICAL REVIEW LETTERS, 2002, 88 (13) :4

[9] Control of magnetization reversal process by light illumination in ferromagnetic semiconductor heterostructure p-(In, Mn)As/GaSb [J].

Oiwa, A ;

Slupinski, T ;

Munekata, H .

APPLIED PHYSICS LETTERS, 2001, 78 (04) :518-520

[10] Magneto-optical properties of a GaAs:MnAs hybrid structure sandwiched by GaAs/AlAs distributed Bragg reflectors:: Enhanced magneto-optical effect and theoretical analysis [J].

Shimizu, H ;

Miyamura, M ;

Tanaka, M .

APPLIED PHYSICS LETTERS, 2001, 78 (11) :1523-1525