Ferromagnetic transition induced by a two-dimensional hole gas in a semimagnetic quantum well

被引：7

作者：

Cibert, J

Kossacki, P

Haury, A

Wasiela, A

d'Aubigne, YM

Dietl, T

Arnoult, A

Tatarenko, S

机构：

[1] Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, F-38402 St Martin Dheres, France

[2] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

[3] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

JOURNAL OF CRYSTAL GROWTH | 1998年 / 184卷

关键词：

ferromagnetism; diluted magnetic semiconductors; 2D hole gas;

D O I：

10.1016/S0022-0248(97)00750-1

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The presence of a ferromagnetic transition in single, modulation-doped quantum wells of Cd1-xMnxTe/Cd1-y-xMgyZnzTe:N is evidenced by magnetospectroscopy. The transition is driven by long-range RKKY interaction between the Mn spins, mediated by the two-dimensional hole gas. Magneto-optic data are well described in terms of a mean-field model. The value of the exchange-held induced by the spin-polarized hole gas is determined. We show that the zero-field splitting which characterizes the ferromagnetic order contains both a p-d exchange term and a contribution due to hole-hole exchange interactions. The initial hole polarization is only partial and increases slowly when the temperature is reduced further below the transition. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：898 / 902

页数：5

共 7 条

[1]

Arnoult A, 1998, J CRYST GROWTH, V184, P445

[2] Free carrier-induced ferromagnetism in structures of diluted magnetic semiconductors [J].