Magneto-optical studies of iron impurity in HVPE GaN

被引：3

作者：

Niedzwiadek, A. ^{[1
]}

Wysmolek, A. ^{[1
]}

Wasik, D. ^{[1
]}

Szczytko, J. ^{[1
]}

Kaminska, M. ^{[1
]}

Twardowski, A. ^{[1
]}

Sadowski, M. L. ^{[2
]}

Potemski, M. ^{[2
]}

Clerjaud, B. ^{[3
]}

Pastuszka, B. ^{[4
]}

Lucznik, B. ^{[4
]}

Grzegory, I. ^{[4
]}

机构：

[1] Univ Warsaw, Inst Expt Phys, Warsaw, Poland

[2] Grenoble High Magnet Field Lab, CNRS, F-38042 Grenoble, France

[3] Univ Paris 06, INSP, UMR 7588, F-75015 Paris, France

[4] Polish Acad Sci, Inst High Pressure Phys, Warsaw, Poland

来源：

PHYSICA B-CONDENSED MATTER | 2007年 / 401卷 / 458-461期

关键词：

III-nitrides and compounds; iron impurity; intracenter transitions; spintronics;

D O I：

10.1016/j.physb.2007.08.211

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on optical studies of bulk GaN crystals doped with iron. High-quality freestanding GaN crystals with varying Fermi level position were grown using the hydride vapor phase epitaxy on bulk GaN substrates. Samples with the dominant neutral Fe3+(3d(5)) acceptor state showed a characteristic near-infrared luminescence band around 1.3 eV, consisting of several sharp lines due to the fine structure of the T-4(1)(G)-(6)A(1)(S) internal transitions of isolated Fe3+ (d(5)) ions. In a magnetic field, these lines split into several components. This allowed us to determine energy structure of the T-4(1), multiplet in the magnetic field. For samples containing a singly ionized Fe2+(3d(6)) acceptor, absorption due to well-resolved E-5-T-5(2) internal transitions of Fe2+ was observed. Measurements performed at different temperatures ranging from 7 to 50 K and at magnetic fields up to 13 T enabled us to analyze some sublevels of the E-5 ground and the T-5(2) excited state. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：458 / 461

页数：4

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