Raman study of Zn1-xMnxGa2Se4 diluted magnetic semiconductors:: disorder and resonance effects

被引：9

作者：

Sanjuán, ML ^{[1
]}

Morón, MC ^{[1
]}

机构：

[1] Univ Zaragoza, Fac Ciencias, ICMA, E-50009 Zaragoza, Spain

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 316卷

关键词：

diluted magnetic semiconductors; Raman scattering; resonance phenomena;

D O I：

10.1016/S0921-4526(02)00574-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A RT Raman study of the diluted magnetic semiconductors Zn1-xMnxGaSe4 (0less than or equal to x less than or equal to1) is presented. The end compounds ZnGa2Se4 and MnGa2Se4 crystallize in the 1 (4) over bar 2m and 1 (4) over bar space groups, in which 12 and 13 Raman active modes are expected, respectively. A full mode assignment has been made for MnGa2Se4. Disorder effects are seen for x < 1 compounds due to partially disordered cation distribution. Resonance effects are observed depending on x, in agreement with the evolution of the optical gap. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：565 / 567

页数：3

共 14 条

[1] EFFECTS OF GROUP-III CATION SUBSTITUTION IN THE RAMAN-SPECTRA OF SOME DEFECTIVE CHALCOPYRITES [J].

ATTOLINI, G ;

BINI, S ;

LOTTICI, PP ;

RAZZETTI, C .

CRYSTAL RESEARCH AND TECHNOLOGY, 1992, 27 (05) :685-690

[2]

Cannas M, 1998, CRYST RES TECHNOL, V33, P417, DOI 10.1002/(SICI)1521-4079(1998)33:3<417::AID-CRAT417>3.0.CO

[3]

2-2

[4]

CARDONA M, 1982, TOPICS APPL PHYSICS, V50

[5] Neutron and electron diffraction studies of ZnGa2Se4 [J].

Hanada, T ;

Izumi, F ;

Nakamura, Y ;

Nittono, O ;

Huang, Q ;

Santoro, A .

PHYSICA B, 1997, 241 :373-375

[6]

JAIN M, 1991, DILUTED MAGNETIC SEM

[7] A COMPARISON OF THE RAMAN-SPECTRA OF ZNGA2SE4 AND OTHER GALLIUM DEFECT CHALCOPYRITES [J].

LOTTICI, PP ;

RAZZETTI, C .

SOLID STATE COMMUNICATIONS, 1983, 46 (09) :681-684

[8] Optical absorption of Zn1-xMnxGa2Se4 diluted magnetic semiconductors:: Variation of the energy gap with composition and temperature [J].

Millán, A ;

Morón, MC .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (03) :1687-1691

[9] Role of an order-disorder phase transition in increasing the exchange magnetic field in a diluted magnetic semiconductor -: art. no. 220402 [J].

Morón, MC ;

Hull, S .

PHYSICAL REVIEW B, 2001, 64 (22)

[10] TERNARY AND PSEUDOTERNARY AB2X4 COMPOUNDS (A=ZN,CD - B=GA,IN - X=S,SE) [J].

RAZZETTI, C ;

LOTTICI, PP ;

ZANOTTI, L .

MATERIALS CHEMISTRY AND PHYSICS, 1984, 11 (01) :65-83

← 1 2 →